也许一个男人频繁眨眼睛只是因为眼睛里进去了一根睫毛，一个女孩捂住嘴只是难为情。
Maybe the guy who's blinking a lot has an eyelash in his eye, and the girl covering her mouth is just self-conscious.
她用手捂住嘴，以免叫出声来。
She put her hand over her mouth to stop herself from screaming.
加兰用手捂住嘴，小心翼翼地打了个嗝。
Garland covered his mouth with his hand and belched discreetly.
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