??? 情景例句
What's eating you?
什么正影響著你的情緒呢？
One woe doth tread upon another's heels.
禍不單行。
This echo-location in bats is often compared with radar, the principle of which is similar.
蝙蝠這種回聲定位常常可與雷達相比較，其原理是相似的。