earplug的复数形式怎么拼写？

n.耳塞...

Luckily we take earplug with us, as the traffic outside our room is very noisy.真幸运，我们带有耳塞，因为房间外面的车辆噪音太大。The workers have to wear earplug to put up with the deafening moise in the factor.工人们必须带耳塞才能够忍耐工厂里震耳欲聋的噪音....

earplug的音标：earplug的英式发音音标为：['ɪəplʌg]earplug的美式发音音标为：['ɪrplʌg]...