327　hand in hand，hand over hand和hand to hand

① hand in hand表示“结合，紧密合作，串通”。

Theory should go hand in hand with practice. 理论必须同实践相结合。

They are hand in hand in the affair. 他们在这件事上串通一气。

② hand over hand表示“有进展，有起色”。

She is getting along hand over hand；she will recover soon. 她日渐好转，很快就会康复了。

③ hand to hand表示“肉搏”。

The fight was then hand to hand，man to man. 当时战斗已成为肉搏战。