🧩 词语组成解析
genus
['dʒi:nəs]
n. （动植物的）属;类;种;型;
🗣️ 情景例句
I have to cram all night for tomorrow's exams.
为了明天的考试，我得熬夜临阵磨枪。
To wait hungrily
饿着肚子等着
It is fairly clear that sleeping period must have some function,
很清楚，睡眠必然具有某种作用。