She sat on the edge of her seat and chewed her fingernails while she watched.

她坐在座位的边缘，一边看一边咬指甲。

Wormtail looked anxious; he was chewing his fingernails, staring down at his paper, scuffing the ground with his toes.

虫尾巴显得有些焦虑，他啃着手指甲，低头盯着自己的试卷，脚尖在地上蹭来蹭去。

If I turned in an examination paper, I used to lie awake and chew my fingernails for fear I hadn't passed.

如果我交了卷子， 我常常醒着躺着咬指甲， 生怕我没有通过。

Fifteen minutes later they were there, and the three of us waited awkwardly together, me chewing my fingernails on a pastel-blue sofa, Mother pacing and clicking her fingers, and Dad sitting motionless beneath a loud wall clock.

十五分钟后他们赶来了，我们三个人一起等待，气氛有点尴尬。我坐在浅蓝色的沙发上咬着手指甲，母亲来回踱步，不停地打着响指，爸爸则一动不动地坐在一台噪音很大的挂钟下方。