ear-plug

n (usu pl 通常作复数) either of two pieces of soft material put into the ears to keep out air, water or noise （防止空气、 水或声音进入耳内的）耳塞.

E number, E, e, E-mail, e. g., e.g., ea, each, each other, eager, eagerly, eagerness, eagle, eagle eye, eagle-eyed, eaglet, ear, ear-ache, ear-drop, ear-drum, ear-muff n, ear-ring, ear-splitting, ear-trumpet, earache, earful, earl, earldom, earliness, early, early and late, early closing, early or late, early warning, earmark, earn, earn one's living, earner, earnest, earnestly, earnestness,