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Caesium - 137 is a radioactive isotope, formed mainly through nuclear fission.是什么意思？

Caesium - 137 is a radioactive isotope, formed mainly through nuclear fission.

铯-137是一种放射性同位素, 主要由核分裂产生.

相关词汇
caesium is radioactive isotope formed mainly through nuclear fission

caesium

n. 铯；

is

vt.& vi. 是（be的三单形式；n. 存在；

radioactive

adj. 放射性的；

isotope

n. [化]同位素；

formed

adj. 成形的，成形加工的；v. 形成，构成，产生( form的过去式和过去分词 )，是，（使）成形，结成（友谊）；

mainly

adv. 大部分地，主要地，基本上；

through

prep. 通过，穿过，经由，透过，凭借；adv. 从头到尾，彻底，自始至终；adj. （电话）接通，通话完毕，有洞的，直达的；

nuclear

adj. 原子核的，原子能的，[细胞]细胞核的；

fission

n. <物>（原子的）分裂，裂变，<生>分裂生殖；
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