Rnaa
[化] 放化中子活化分析
🗣️ 情景例句
OK, sir, just sit tight, and we'll have an ambulance there in about ten minutes.
好的，先生。你就在那边等着，救护车10分钟之内到。
Do you want me to explain?
让我替你说明好吗？
Is this your umbrella?
这把伞是您的吗？