defoliant的复数形式怎么写

The crash had spilled a noxious defoliant into the planet's ecology, ravaging the native flora.这次坠毁将一种有害的落叶剂洒入星球的生态系统中, 破坏着当地的植物群.Defoliant: Chemical dust or spray applied to plants to cause their leaves to drop off...

defoliant的音标：defoliant的英式发音音标为：[ˌdi:'fəʊliənt]defoliant的美式发音音标为：[ˌdi'foʊliənt]...

n.脱叶剂，落叶剂...