stem of a plant

例句：

1. 1. The tree has a strong stem that supports the weight of the branches.
   这棵树有一个强壮的茎，支撑着树枝的重量。
2. 2. The stem of the flower is green and covered in tiny hairs.
   花的茎是绿色的，上面覆盖着细小的毛。
3. 3. The stem of the plant was cut off to prevent it from spreading.
   为了阻止植物扩散，将它的茎切断了。