join up

v. 联合起来, 入伍

例句与用法：

We both joined up in 1939.

我们俩都是1939年入伍的。

Nowadays, people can join up each other by telephone.

现在人们能通过电话互相联系了。

详细释义：

1. 连接

The electrician joined the wires up.

电工把电线连接起来。

2. 入伍

He joined up in 1980.

他一九八○年入伍。