✅ 同义词
🗣️ 情景例句
we don't have to.
我们不必勉强。
Don't forget to write your return address on the letter.
不要忘记在信封上写你的回邮地址。
It immediately ran away when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered.
她刚看见它，它就立刻逃走了。专家证实，美洲狮非被逼得走投无路，是决不会伤人的。