Fissiochemistry
[机] 核分裂化学
🗣️ 情景例句
One step at a time.
做事要一步一步来。
Excuse me to have kept you waiting.
对不起让你就等了。
Oh! She's falling off her bike. I hope she didn't hurt herself.
噢！她正从自己的自行车上跌落下来。我希望她没有摔伤。