| 释义 |
on one's best ／good behaviorbehaving right 行为规矩 * While his father was around, the boy was on his good behavior, but when the father left, the boy soon got into mischief. 父亲在场时，这孩子规规矩矩，但父亲一走，他马上就调皮起来。 * The naughty boy is on his best behavior today. 今天这个调皮鬼表现很好。 |