Radiotoxin
n. 放射性毒素
??? 情景例句
When did you come here?
是什么時候來這兒的？
Would you please read the draft contract and make your moments about the terms?
請仔細閱讀合同草案，并就合同各條款提出你的看法好嗎？
From 1830 onwards in the USA and from about 1870 in Canada, settlers began to move westwards and to take possession of the plains as their own.
美國自1830年起，加拿大從1870年左右起，殖民者開始向西遷移，并把平原據為己有。