graft transformation

• 树

graft transformation的用法和样例：

例句

1. Many trees succumb as a black line develops along the graft union.
   沿着嫁接结合处长着一条黑线，结果许多树都死亡了。
2. Stock is the root, tree, or portion of a tree which the graft is set.
   砧木是根，或是树体，或是在它上面嫁接树体的部分。