Actinoid
a. 放射线状的\\n[化] 锕系元素; 锕系
🗣️ 情景例句
I've put an X next to the place where you should sign.
我已在你该签名的地方后面标示了X。
He was content that the thing had happened.
这事终于发生了，对此他是满意的。
Thanks, Bob. I won't.
谢谢，鲍勃，我不会的。