join hands 对吗,还是join in hands

join hands:
联手,携手
例句与用法:
1.Don't waste our energies.Let's join hands in the business.
不要浪费精力了,咱们一起干吧.
2.Let's join hands and struggle together.
咱们携起手来共同斗争.
3.I saw them join hands and walk together.
我看见他们手拉手一起走.
4.A country-dance figure in which couples or a couple join hands and swing around the floor.
拉手环舞一对或几对舞伴双手相牵在地板上转圈跳的乡村舞蹈