2. She has bitten her nails down to the quick. 她咬指甲都咬到了活肉。
3. I was bitten by a dog once and I've been afraid of them ever since. 我曾被狗咬过,自那以后就一直害怕狗。
4. Bitten twice, the postman refused to deliver our letters unless we changed our dog. 被我们的狗咬了两次,邮递员拒绝给我们送信,除非我们把狗换了。
5. She showed no fear in any of the situations and had to be prevented from touching the tarantula because of the high risk of being bitten. 在任何情况下,她没有表现出一丝恐惧,因为被狼蛛咬伤的风险很高,所以必须阻止她接触狼蛛。