警察佩戴徽章以表明身份。

The police officers wore badges to identify themselves.

警察出示了他的徽章以表明身份。

The police officer showed his badge to identify himself.

每种角色又有表明身份的脸谱、扮相等，只要演员一上场，你一望便知。

Every type of role wears its own facial makeup and costume, which is so telltale that you can figure out its identity the moment it appears on the stage.

首先双方父母会相互交换可以表明身份的信物。

First both sets of parents exchanged family credentials as tokens of intention.

很多老师没有“表明身份”，他们在博客中对学生及同事用的是化名。

Many teachers do not identify themselves, and they change the names of students and co-workers.

当时犹太人必须身上佩带黄星表明身份，并被赶进犹大隔离区，有些隔离区完全以墙隔绝。

For the time being, the Jews have to be identified marked with a yellow star and herded into the ghettoes, some of which are completely walled off.

洪少余表明身份，但却遭到赵怀安的质疑，说他冒名顶替，于是，洪少余亮出了就职文书，终于让赵怀安哑口无言，只能迎接洪少余。

Hong Shaoyu questioned that status, but it was Zhao Huaian, he said so, impostor, Hong Shaoyu showed the office documents, finally let Zhao Huaian meet Hong Shaoyu can only be rendered speechless.