One group wasn't watered for five days, another group had the stems cut off and the last group was untouched.

一组植物五天没有浇水，另一组植物的茎被剪掉，最后一组则保持了原状。

The researchers repeated the experiment with another set of plants, half of which had their stems cut, and half of which were left undamaged.

研究人员用另一组植物重复了这个实验，其中一半的茎被切断，另一半则完好无损。