眼鏡glasses; 耳機(jī)earphones; 鞋shoes;褲子trousers等詞本身是復(fù)數(shù)。 如:My glasses were on the chair just now. 但如果表示這雙,這副,一雙的時(shí)候用單數(shù) 如:There is a pair of chopsticks on the plate. This pair of earphones is for you.