我们安装了几台中继器来增强办公室的WiFi信号。

We installed several ___repeaters to strengthen the WiFi signal in the office.

这些老式连发枪在西部片中经常出现。

These old ___repeaters often appear in western movies.

老师为留级学生安排了额外的补习课。

The teacher organized extra tutoring sessions for the ___repeaters.