英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

platina    
n. 白金;铂

白金;铂

Platina \Plat"i*na\, n. [Sp. or NL. See {Platinum}.] (Chem.)
Platinum.
[1913 Webster]

{Platina mohr}, platinum black.

{Platina yellow}, a pigment prepared from platinum.
[1913 Webster]


Platinum \Plat"i*num\, n. [NL., fr. Sp. platina, from plata
silver, LL. plata a thin plate of metal. See {Plate}, and cf.
{Platina}.] (Chem.)
A metallic element of atomic number 78, one of the noble
metals, classed with silver and gold as a precious metal,
occurring native or alloyed with other metals and also as the
platinum arsenide (sperrylite). It is a heavy tin-white metal
which is ductile and malleable, but very infusible (melting
point 1772[deg] C), and characterized by its resistance to
strong chemical reagents. It is used for crucibles in
laboratory operations, as a catalyst, in jewelry, for stills
for sulphuric acid, rarely for coin, and in the form of foil
and wire for many purposes. Specific gravity 21.5. Atomic
weight 195.1. Symbol Pt. Formerly called {platina}.
[1913 Webster PJC]

{Platinum black} (Chem.), a soft, dull black powder,
consisting of finely divided metallic platinum obtained by
reduction and precipitation from its solutions. It absorbs
oxygen to a high degree, and is employed as an oxidizer.


{Platinum lamp} (Elec.), a kind of incandescent lamp of which
the luminous medium is platinum. See under {Incandescent}.


{Platinum metals} (Chem.), the group of metallic elements
which in their chemical and physical properties resemble
platinum. These consist of the light platinum group, viz.,
rhodium, ruthenium, and palladium, whose specific
gravities are about 12; and the heavy platinum group,
viz., osmium, iridium, and platinum, whose specific
gravities are over 21.

{Platinum sponge} (Chem.), metallic platinum in a gray,
porous, spongy form, obtained by reducing the double
chloride of platinum and ammonium. It absorbs oxygen,
hydrogen, and certain other gases, to a high degree, and
is employed as an agent in oxidizing.
[1913 Webster]


请选择你想看的字典辞典:
单词字典翻译
platina查看 platina 在百度字典中的解释百度英翻中〔查看〕
platina查看 platina 在Google字典中的解释Google英翻中〔查看〕
platina查看 platina 在Yahoo字典中的解释Yahoo英翻中〔查看〕





安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Microsoft Support
    Microsoft Support is here to help you with Microsoft products Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows 11, Surface, and more
  • Microsoft 365 Customer Service and Support
    The type of support Microsoft provides for consumers depends on the product you're calling about and if you have a product for home or for business use It can also depend on if you want help for an issue with a service like OneDrive or Outlook com, or help with Windows, but you don't have an existing Microsoft 365 subscription
  • Contact Us - Microsoft Support
    Contact Microsoft Support Find solutions to common problems, or get help from a support agent
  • Account help - support. microsoft. com
    Get help for the account you use with Microsoft Find how to set up Microsoft account, protect it, and use it to manage your services and subscriptions
  • Home | Microsoft Community Hub
    Our community is a collaborative place to learn about our products and ask questions! Check out our most popular conversations!
  • Outlook help learning - support. microsoft. com
    Get help with Outlook for Windows, the Outlook app, Outlook com, and more Find training videos, how-to articles, and Outlook support content
  • Windows help and learning - support. microsoft. com
    Find help and how-to articles for Windows operating systems Get support for Windows and learn about installation, updates, privacy, security and more
  • Manage app permissions for a camera in Windows - Microsoft Support
    Manage app permissions for a camera in Windows Note: Camera privacy settings for desktop apps can't be changed at an individual desktop app level Desktop apps include apps installed from the internet, a USB drive, or apps installed by an IT administrator Internet browsers, like Microsoft Edge, and video conferencing apps, like Microsoft Teams, are desktop apps that need this setting turned on
  • Manage your saved passkeys - Microsoft Support
    Passkeys created for your Microsoft accounts can also be managed through your personal or work school security dashboard For other synced credential managers, such as Microsoft Password Manager, go to the provider or service to manage passkeys stored there Select an option below to learn more
  • Get started with Microsoft 365 Copilot Notebooks
    Introducing Copilot Notebooks–your own AI-powered workspace designed for the content that matters most to your task Bring together all your relevant resources including Copilot Chat, files, pages, meeting notes, links, and more in one place Share notebooks with your team to collaborate in real time, exchange knowledge, and build together with Copilot As you work, get focused answers





中文字典-英文字典  2005-2009