Radioactive hydrogen
[医] 放射性氢
🧩 词语组成解析
🗣️ 情景例句
Forget it.
不足挂齿。
I don't think so.
我可不这么想。
He noticed at once that discipline was slack: the Danes had the self-confidence of conquerors, and their security precautions were casual.
他马上发现丹麦军纪律松弛，他们以征服者自居，安全措施马马虎虎。