1ADJ [ADJ n]壓縮空氣推動(操作)的;風動的;氣動的 A pneumatic drill is operated by air under pressure and is very powerful. Pneumatic drills are often used for digging up roads. 壓縮空氣推動(操作)的;風動的;氣動的
...the sound of a pneumatic drill hammering away.
風鑽鑽個不停的轟鳴聲
2ADJ [ADJ n]充氣的Pneumatic means filled with air. 充氣的