conch的复数形式怎么写？

n.贝壳，海螺壳...

conch的音标：conch的英式发音音标为：[kɒntʃ]conch的美式发音音标为：[kɑntʃ]...

Roger took the conch and looked round at them gloomily.罗杰拿起海螺,神色沮丧地环顾着大伙儿.This toy of voting was almost as pleasing as the conch.这场选举的游戏几乎象海螺那样令人开心.The conch exploded into a thousand white fragments and ceased to exist.海...