air-trap

基本解释

Cup your hand slightly to form an air trap and force the sleeve down over the piston assembly with a rapid slap (hard) on the open end of the diaphragm with your cupped hand.
手稍微窝成杯状，形成一个气罩，用杯状的手迅速拍击在隔膜的开口端上，将套筒往下压到活塞总成的上面。
Air trapped inside a condom could cause it to break.
安全套内藏空气会令安全套破烂。
Reconditioned radiator or cooling system refilling (possibly under filled or air trapped in system).
重新调整散热器或加注冷却系统(可能填充不满或系统中空气阻塞)
Patchy ground-glass opacity may also be present, as may patchy lucency due to air trapping.
也可见毛玻璃样影和空气潴留所致的斑片状的透亮区（阻塞性肺气肿？）。
Air trapped in pastry inflate when heated, making hole there will help to keep your pastry in good shape.
酥皮入馅料前用刀微刺穿是避免当酥皮遇热焗至松起时，会影响其外观。