join on

• • (使)连接；(使)安装：

    How do the legs of this toy animal join on?

    这个玩具动物的腿是怎么装上去的?

    The train will stop at the next station to join two more carriages on.

    火车将在下一站停靠，增加两节车厢。

  • (使)附随；(使)跟上：

    When the climbers looked back,they saw that two uninvited visitors had joined on.

    当登山者们向后看时，他们看见两名不速之客加入了登山的行列。