必须
word A1- must; to have to
Its characters
From the library
我们多年聚族而居的老屋，已经公同卖给别姓了，交屋的期限，只在本年，所以必须赶在正月初一以前，永别了熟识的老屋，而且远离了熟识的故鄕，搬家到我在谋食的异地去。
我们可以说，前者是自由些，后者是谨严些：诗的字句、音节，小说的描写、结构，戏剧的剪裁与对话，都有种种规律（广义的，不限于古典派的），必须精心结撰，方能有成。
出门的时候必须带一把伞。
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