Halley
n. 哈雷（姓氏）
🗣️ 情景例句
For example, did you know that 1 in 4 teenagers has tried marijuana?
比如，你是否知道4个青少年中就有1位曾经吸过大麻？
what's his native language?
他的母语是什么？
It is fairly clear that sleeping period must have some function,
很清楚，睡眠必然具有某种作用。