phr. a leg up 1. (在攀登、上马或越障时给予的)帮助
The wall is very low, and your servant will give you a leg up. 这墙很低，你的仆人可以帮你一把让你翻越过去。
2. 鼓励；支持
The Government would at last give a leg up to the bill. 政府最终会支持这个议案。
3. 优势
Normally an incumbent president has a leg up on any challenger. 现任总统通常(在竞选中)比任何挑战者更具有优势。
as fast as one's legs can (或 could, will, would) carry one 以最快速度，以全速
be all legs (人)过分瘦长
be off one's leg 休息，歇脚
be on one's hind legs 〈英口〉站着(演说等)
be on one's last legs 濒于死亡；即将失败(或崩溃、破产、损坏等)
be on one's legs 1. 站着(演说等)
I have been on my legs all day and I am tired out. 我从早站到晚，累极了。
2. 身体康复到可起来走动
3. 昌盛，富裕；站稳脚跟
be run off one's legs 1. 筋疲力尽
2. 破产
break a leg 大获成功(用作对演员的祝愿语)
change the leg (马)改换步子
fall on(或 upon) one's legs 侥幸摆脱困境；逢凶化吉
He is a lucky fellow, and always seems to fall on his legs. 他是个幸运儿，似乎总能化险为夷。
feel (或 find) one's legs 1. (婴孩等)开始能够站立(或行走)
2. 开始意识到自己的力量(或能力)；变得自信
The firm is feeling its legs. 这家公司开始站住脚跟了。
get a leg in 〈口〉取得…的信任
get on one's hind legs 1. (马)直立
2. (人)发怒；变得武断(或咄咄逼人)
3. 〈英口〉站起来(演说等)
get one's leg over 〈英俚〉〈粗〉(男人)性交
get sb. back on his legs 1. 使某人恢复健康
2. 使某人在经济上自立
get up on one's hind legs= get on one's hind legs
hang a leg犹豫不决
have a bone in one's (或the) leg 见 bone
have legs 速度快；有耐力
have no legs 〈口〉【高尔夫】(球)无足够势头到达需要的某一点
have not(或 not have) a leg to stand on 〈口〉(论点、要求等)站不住脚，完全缺乏根据
Without evidence, the prosecutor doesn't have a leg to stand on. 因无证据，原告的起诉站不住脚。
have the legs of (或 on) 〈口〉(能)比…跑得快
keep one's legs 站得稳，不倒
leg it 1. 行走；跑开
He legged it for the exit. 他疾步向出口走去。
The children legged it up the street before I could catch them. 我还来不及捉住那些孩子，他们已沿着大街跑掉了。
2. 做采访记者，跑新闻
The columnist has been legging it for 20 years. 那个专栏作家从事采访工作已有20年了。
make a leg 行屈膝礼
pull sb.'s leg 〈口〉同某人开玩笑；取笑(或愚弄)某人
I suspected that he was pulling my leg. 我怀疑他是在愚弄我。
put one's best leg forward (或 foremost) 〈口〉
1. 以最快速度走(或跑)
You must put your best leg foremost, we are rather late. 你必须拼命赶，我们已经相当晚了。
2. 全力以赴
run sb. off his legs 使某人疲于奔命
scrape a leg 行礼姿势笨拙别扭
set sb. on (或 upon) his legs (again) 1. 使某人地位(或生计)得到保证
2. 给某人以经济(或其他)方面的援助
3. 使某人恢复健康
shake a leg 〈口〉
1. [常用于祈使句]赶快
Shake a leg there! We'll never finish if you don't hurry up. 快点吧! 假如你不抓紧，我们就完不成了。
2. 跳舞
Come on now, let's shake a leg. 快来，让我们跳个舞吧。
3. 出发；开始
shake a loose (或 free) leg 〈俚〉过放荡生活
show a leg 1. 〈俚〉(早上)起床
2. 赶快
stand on one's own legs 独立；自立
A boy of twenty ought to be able to stand on his own legs. 一个20岁的男孩应该能够自立了。
stretch one's legs (久坐后)散步；进行必要的(散步)锻炼
take to one's legs 逃走
They took to their legs in terror. 他们惊恐地逃走了。
talk a donkey's (或 dog's) hind leg off 〈口〉说话滔滔不绝
She would talk a donkey's hind leg off if you gave her the chance. 假如你给她个说话的机会，她一开口便会没完没了。
talk the hind (或 back) leg(s) off a donkey (或 dog, horse, mule) = talk a donkey's (或 dog's) hind leg off
tied by the leg(由于某种情况而)受到阻碍
trot sb.off his legs (带某人观光等) 使某人走得双腿发软
try it on the other leg 〈口〉用所剩的最后办法去试
walk one's (sb.'s) legs off 使自己(某人)走得疲惫不堪
Tom will walk you off your legs if you go out with him. 如果你同汤姆一起出去，他会让你走断腿的。