Ballisties
[机] 弹道学
🗣️ 情景例句
I know what you mean. I'v been there.
我明白你的意思。 我深有体会。
A servant is known by his master's absence.
主人不在可以看出仆人的品行来。
If you learn even a little English, you will find it usedful after you leave school.
假如你哪怕只是学一点英语，毕业后，也会发现它是有用的。