Much of their study and revision was done to the thud of hammers and pneumatic drills.他们学习和复习时大多都伴着锤子和风钻沉闷的敲击声。The pneumatic robot uses air to move and sticks to surfaces by suction.气动机器人利用空气来移动，靠吸力附着于各种表面。Lewis heard the sound of a pneumatic drill hammering away.刘易斯听到风钻钻个不停。The movie stars a pneumatic blonde.这部电影的主角是一位体态婀娜的金发美女。