您要查找的是不是：
- He persuaded her to sign the document by guile. 他用欺骗手段说服她在文件上签字。
- The acoustics is a branch of physical. 声学是物理学的一个分支。
- The acoustics of this concert hall are excellent. 这个音乐厅的传音效果极好。
- There is no sign of a let-up in the hijack crisis. 绑架危机毫无缓和迹象。
- I was forced to sign the agreement against my will. 我被迫违心地在协议上签了字。
- Soldiers sign out when they leave the barracks. 士兵离开营房得登记签字。
- She made a sign for me to approach her. 她对我发出靠近她的暗号。
- Dark clouds are a sign of rain or snow. 乌云是雨或雪将至的预兆。
- Make sure that the sign's the right way up. 一定要把符号的上下弄对。
- He wore crape as a sign of mourning. 他戴着黑纱表示哀悼。
- Certain sign precede certain event. 事情发生，必有先兆。
- There's no sign of him mending his ways. 看不出他有改进生活方式的迹象。
- The rising level of crime is a sign of the times. 犯罪率增高是这一时代的特徵。
- He removed his hat as a sign of reverence. 他脱下帽子表示敬意。
- Now let's draft the contract and then sign it. 那么我们起草合同，然后签字。
- The postman asked me to sign for the parcel. 邮递员叫我签收包裹。
- Shaking the head is a sign of negation. 摇头表示否认。
- The acoustics of the hall are so good that you can hear everything even from the cheapest seats. 这座会堂的音响效果极佳，连最便宜的座位也能听得一清二楚。
- Is it definite that they will sign that contract? 他们肯定会签署这份合同吗？
- The acoustics of this theater are admirable. 这个剧院的音响效果很好。
