当心: in the middle; in the centre ...碰: touch; bump脑袋: head当心碰脑袋: mind your head当心碰头: mind your head当心碰撞: beware of collisions脑袋: [口语] head当心: 1.(正中间) in the middle; in the centre2.(小心, 留神) take care; be careful; look out 当心碰脑袋! mind your head. 当心有车! look out! mind the car. 当心别把试管打碎了。 take care not to break the test tube! 当心路滑。 watch your step.the road is slippery. 当心别踩了庄稼。 be careful not to step on the crops对心碰: central impact磕头碰脑: 1.(人和东西相碰) bump against things on every side2.(人和人相碰) push and bump against one another大脑袋: big headed; jolterhead掉脑袋: get beheaded砍脑袋: cut the head off对心碰撞: central collision; central impact; centrical impact偏心碰撞: eccentric collision; eccentric impact; off center impact小心碰头: mind your head/watch your head; warning: head injury, low shelves; watch your head/mind your head不当心: non attention赤当心: red color matches the heart当心, 警惕: keep an eye out for当心,堤防: look out当心,警惕: keean eye out当心,小心: look out当心,注意: take care; takecare当心,谨慎: take care当心,留神: heads up