coverone'sbreastwithcoatunbuttoned;掩着怀
Shecoveredherfacein[with]herhands.她双手掩面。
withthedoorleftunlockedorunlatched;虚掩着门
closeabook掩卷
Igotmyfingerscaughtinthedoor.手被门掩了一下。
launchasurpriseattack;掩袭
makeasurpriseattack;pounceontheenemy掩杀