join in
1. 参加
They are going to join in the singing.
他们将参加唱歌。
join on
1. 跟随
We were going for a walk and they joined on.
我们正要去散步, 他们也跟了去。
2. 连接上
Two more carriages will be joined on at the next station.
在下一站将加挂两节车厢。
join up
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。
习惯用语join hand in hand1.同心协力join in1.参加(某活动)2.和...一起(做某事)join on (to)1.加上去, 连上去, 安装在...join oneself to1.加入; 归附join ...together1.把...连成一体join up1.参军2.把...连接起来; 咬合, 接入(电路)join up with1.汇合join with1.和...合伙, 和...合作; 同情2.和...交战[接火]特殊用法continuous rail joins1.(接轨用)鱼尾板diagonal join1.对角线结合点direct join1.直并mill join1.【刷】卷筒纸接头picture join1.(屏幕录象中)片速帧频差均衡法reduced join1.约化联接