must的例句

must 的相关例句:

61.	He must put more effort into his work.
	他必须更加努力工作。
62.	A billiard-table must be perfectly even.
	台球桌必须十分平。
63.	You must understand the elements of mathematics before we can proceed further.
	你必须先弄懂数学基础知识,我们才能进一步学习。
64.	That must be somebody else's coat; it isn't mine.
	那一定是别人的外衣,不是我的。
65.	He must be joking or else he's mad.
	他准是开玩笑,要不就是疯了。
66.	All air must be excluded (from the bottle) if the experiment is to work.
	若要做好这一试验,不得让空气进(到瓶子里)去。
67.	All draughts must be excluded from the room.
	这间屋子不可有风透进。
68.	We must not exclude the possibility that the child has run away.
	我们不可排除这孩子离家出走的可能性。
69.	I must look out some bits and pieces for the church jumble sale.
	我得找些零碎东西捐给教堂作义卖。
70.	We must look over the house before we decide to rent it.
	我们必须先查看一下这所房子再决定租不租。