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II . American [əˈmerıkən] 名词

America [əˈmerıkə] 名词

1. America:

3. America:

Americandom [əˈmerıkəndəm] 名词

Amerasian [ˌæməˈreıʃən]

Americanophile [əˈmerıkənəfaıl] 名词

Afro-Americanism [ˈæfrəʊəˈmerı­kənı­zəm] 名词

单语范例(未经PONS编辑处理)

英语
The americium-241 and curium-242 isotopes also were produced by irradiating plutonium in a nuclear reactor.
en.wikipedia.org
With its half-life of 432.2 years, the americium in a smoke detector includes about 3% neptunium after 19 years, and about 5% after 32 years.
en.wikipedia.org
They checked for different radioactive substances including gamma emitters, plutonium, americium and strontium.
en.wikipedia.org
Scarcity and high price yet hinder application of americium as a nuclear fuel in nuclear reactors.
en.wikipedia.org
The crystal structure of americium changes with pressure and temperature.
en.wikipedia.org
The most abundant, or easy to synthesize actinides are uranium and thorium, followed by plutonium, americium, actinium, protactinium and neptunium.
en.wikipedia.org
The transuranium elements americium and curium also remain in the aqueous phase.
en.wikipedia.org
In order to allow the actinides such as americium to be either reused in industrial sources or used as fuel, the lanthanides must be removed.
en.wikipedia.org
Americium is produced mostly artificially in small quantities, for research purposes.
en.wikipedia.org
Plutonium-241 is the parent isotope of the neptunium decay series, decaying to americium-241 via or electron emission.
en.wikipedia.org

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