Velocitron
质谱仪
🗣️ 情景例句
OK, Robbie, maybe you should watch him. Robbie
也许你得看着他点。
Don't worry. Everything will work out all right.
别担心了，一切都会好的。
On the other hand, I felt sad that I wasn't able to tell my grandparents that we were safe.
另一方面，我为不能告诉我的祖父母我们十分安全而感到难过。