If you fail the first time, try again.
如果第一次失败了，再试一次。
Again, spending too long at the computer results in painful wrists and fingers.
另外，长时间使用电脑还会导致手腕和手指疼痛。
Again and again I warned him of the danger.
我一再警告他有危险。
Parents feel that it is difficult to live with teenagers. Then again, teenagers have similar feelings about their parents.
父母们觉得很难与青少年一起生活。不过，青少年对父母也有相似的感受。