例句：
1、He fastened the papers together with a paper clip.
他用回形针别好了文件。
2、 The dog fastened its teeth in his leg.
狗死死咬着他的腿。
3、Fasten the gates securely so that they do not blow open.
把大门闩好以免被风吹开。
4、His hand fastened on her arm.
他用手牢牢抓住她的胳膊。
5、She fastened the belt loosely around her waist.
她把皮带松松地系在腰上。