Actinide contraction
[化] 錒系收縮
?? 詞語(yǔ)組成解析
n. [化]錒類
contraction
[k?n'tr?k??n]
n. 收縮，縮減;[語(yǔ)]縮略，略體，縮寫;（開支等）縮減;（分娩時(shí)）子宮收縮;
??? 情景例句
Can I help you?
我可以幫上忙嗎？
Hello.
你好！
If, at the time, the British had not feared invasion, it would have been completed.
如果不是因?yàn)槟菚r(shí)英國(guó)人害怕入侵，隧道早已建成了。