broadleaf的复数形式怎么写？

Annual broadleaf and grass weeds are major problems.主要杂草是一年生阔叶杂草和禾本科杂草.To the south Sycamore trees create a tall , broadleaf canopy.在城区的南部,是一片树冠宽大枫树林.And that of broadleaf tree specieswere occupied 13 % and 15 % respecti...

broadleaf的音标：broadleaf的英式发音音标为：['brɔ:dli:f]broadleaf的美式发音音标为：['brɔdlif]...

n.阔叶烟草，阔叶树...