您要查找的是不是：
- Your impurity must be cleansed. 必须净化你的非道德。
- This impurity must be purged away after death. 这种污秽应该在死后加以净化。
- If sand filters are used, they must be cleansed periodically by backwash. 假如使用沙粒过滤器,必须定期以反冲方法清洗沙粒,直至污水变得清澈为止。
- I've forgotten your name again I must be slipping. 我又把你的名字给忘了--我肯定是不行了。
- You sold it? You must be out of your senses! 你把它卖了? 你简直是疯了！
- Your words must be gall and wormwood to him. 你的话在他听来一定逆耳。
- The surface must be thoroughly clean. 表面必须彻底弄清洁。
- You must be out of your mind if you think I'm going to lend you 50! 你以为我会借给你50英镑，你准是疯了！
- Your complaint must be made through the proper channels. 你的意见必须通过正当途径投诉。
- It must be difficult to play various personae in the same movie. 在同一个电影中扮演不同的角色肯定不容易。
- The law provides that these ancient buildings must be preserved. 法律规定，这些古老的建筑应该保存。
- The stamp in your library book shows it must be returned tomorrow. 你从图书馆借的书上的戳记表明，这本书必须明天归还。
- The work must be finished in one way or another. 这件事必须设法做好。
- It is a fact that must be faced up to. 这是必须正视的事实。
- She must be made to comply with the rules. 必须强迫她遵守这些规则。
- All bookings must be made by post. 所有预约都必须用信函形式。
- The noise of your radio must be limited to a level that we can all bear. 你收音机的音量必须控制在我们大家都以忍受的范围内。
- You must be weak in the head if you believe that. 你相信那件事可就太傻了。
- He gets tired easily; he must be out of shape. 他很容易疲倦，一定是身体有毛病。
- I must be at Hudson before I break my fast. 吃早饭之前，我肯定已到哈得逊区。
