您要查找的是不是：
- Have you stuck down the back of the envelope? 信封背面开口处贴牢了吗？
- He steamed the stamp off the envelope. 他用蒸汽把信封上的邮票揭下来。
- He glued a stamp onto the envelope. 他把邮票贴在信封上。
- As he picked up the envelope, a key dropped out. 他拣起信封时，一把钥匙掉了出来。
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- As she picked up the envelope, a key dropped out. 她拾起信封时，一把钥匙掉了出来。
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- Put a stamp on the envelope, will you? 在信封上贴张邮票，好吗？
- He stuck a stamp on the envelope. 他在信封上贴上邮票。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- She opened the envelope with her fingertips. 她用指尖弄开了信封。
- The envelope's seal was torn open. 信封封缄被撕开了。
- The drainage system has been aged. 排水系统已经老化了。
- The (flap of the) envelope was unstuck. 信封(的封口)没粘住。
- They called for a radical reform of our tax system. 他们要求对税收制度进行根本改革。
- There are several enclosures in the envelope. 信封内装有几份附件。
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
- An envelope or wrapper for mail. 封套，信封为邮寄而制的信封或封套
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
