stem stream

例句：

1. 1. The tree has a long stem and strong branches.
   这棵树有很长的茎和强壮的树枝。
2. 2. The stem of the plant is green and covered in hairs.
   植物的茎是绿色的，上面覆盖着毛。
3. 3. The stem of the flower is red and looks like a small tree.
   花的茎是红色的，看起来像一个小树。