Treeline
n. 树木生长线（按海拔标示的树木生长上限）
🗣️ 情景例句
Without my glasses, I'm as blind as a bat.
没有眼镜， 我就像个蝙蝠一样瞎。
Repetition is the mother of knowledge.
反覆学习是知识之源。
It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash.
不久，一架直升飞机飞抵飞机失事现场，来搭救这几个幸存者。