cottonwood的复数形式怎么拼写

cottonwood的音标：cottonwood的英式发音音标为：['kɒtnwʊd]cottonwood的美式发音音标为：['kɑtnwʊd]...

Its banks were shaded by cottonwood and redwood trees.河流的两岸被棉花树和红木树遮蔽住了。Cottonwood, maple, pinewood, birch , miscellaneous tree, trimmed log or heart wood of clamp - shaft remained.杨木, 枫木,松木, 榆木, 杂木, 修直以后的原木或有卡剩下的木芯....

n.三叶杨，棉白杨...