名詞 jackhammer:

1. a hammer driven by compressed air
   同義詞：air hammer, pneumatic hammer

1. A system or device for doing work, as an automobile or a jackhammer, together with its power source and auxiliary equipment.
   機(jī)械系統(tǒng)用來(lái)工作的系統(tǒng)或裝置，如汽車(chē)或手持式鑿巖機(jī)，包括其動(dòng)力源和輔助設(shè)備

jack.ham.mer

n.（名詞）
A hand-held machine for drilling rock and breaking up pavement, operated by compressed air.
手提鉆，輕型鑿巖機(jī)：通過(guò)壓縮空氣運(yùn)轉(zhuǎn)的鉆巖石、挖隧道的手持機(jī)器

【引伸】
jack.ham.mer
v.（動(dòng)詞）