Decay series
[化] 衰变系; 放射系
🧩 词语组成解析
🗣️ 情景例句
Do you want manual or automatic transmission?
你的汽车想配备一个手动挡还是自动挡？
The purpose of this meeting is to discuss possible solutions for the pending issues.
本次会议的目的就是要讨论对悬而未解的问题的可能解决办法。
But the first people who were like ourselves lived so long ago that even their sagas, if they had any, are forgotten.
但是，和我们相似的原始人生活的年代太久远了，因此，有关他们的传说既使有如今也失传了。