英文釋義
any of various usually acidic organic substances that promote cell elongation in plant shoots and usually regulate other growth processes (such as root initiation): such as
例句 Example
Whenever a plant responds to applied , i . e . , unbalanced, applications of auxin, ethylene is produced.
當一植物對不平衡地施用生長素起反應時, 總是産生乙烯.