The construction worker battered away at the concrete with a jackhammer.建筑工人用手提钻机在混凝土上不断打孔.She held her ears when the jackhammer started to operate; hold one's nose.当手提钻开始工作时,她塞住耳朵; 塞住鼻子.I talk to my friend and some...

n.手提钻...

jackhammer的音标：jackhammer的英式发音音标为：['dʒækhæmə(r)]jackhammer的美式发音音标为：['dʒækˌhæmɚ]...