改过

It is incumbent on me to reclaim him.

劝他是我义不容辞的义务。

A bad habit in a child should be nipped in the bud.

应该尽早把孩子的坏习惯来。

The thief has amended.

这小偷自新了。

However, because the villager committed this crime with a secretiveness not in keeping with his thickheaded ness, it remained a "perpetrator unknown" crime.

然而，由于该村民一去的笨脑袋，闭口不谈自己的罪行，使该案成为悬案。