Instantaneous velocity
[化] 瞬时速度
🧩 词语组成解析
🗣️ 情景例句
Do you think they're open?
你们说现在还开门吗？
Sorry, but I have to go. Peace!
对不起，我必须走了，祝无恙！
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。