Deutoxylem
后生木质部
🗣️ 情景例句
Sorry, I've already got plans.
对不起， 我有事。
I would like to talk to Mr. Liu.
我想请刘先生来听电话。
The bridge is so long that the shape of the earth had to be taken into account by its designer.
由于桥身太长，设计者不得不考虑了地表的形状。