old dog 上年纪的人
old hand 老手
old maid 老处女
old man 老爸,男朋友,老公
old timer 老手,老资格
on a good note 欢尽而散
on a horse 快马加鞭
on a roll 进展顺利,势如破竹
on pins and needles 坐立不安
on the back burner
on the edge of my seat 专心地听和看
on the level 说真话
on the nose 整点,整齐
on the rock 处境困难
on the up and up 诚实,坦率
one track-minded 大脑不灵活
one way or the other 千方百计
oned 神志不清
out and about 户外活动
out and out 完全地
out at elbows
out of one's hold 脱手
out of form 不合时,不合身
out of it 精神恍惚
get canned 失业
out of my line
out of sort 发脾气
out of spirit 心神不安
over and over 多次地,重复地
over grown 孩子气
own boss 自己当老板