stumbling

1.that bunch of stumbling amateurs.

那群老是出错的业余人员。

2.a major stumbling block to the acceptance of homeopathy.

接疗法的主要障碍。

3.got a real shiner from stumbling into the door.

撞到门上弄个乌眼青

4.The question of disarmament proved a major stumbling block to agreement.

结裁军问题是达成协议的主要障碍。