单词“up”作为副词的时候，它的一些词义从表面看容易引起混淆。最明显的是意为“release; open;to a stop or halt state ”；即表示达到一种“放松；放开；停止或挂起的状态”。当表示“停止”意义的时候，常与draw,bring,fetch,pull一起使用。
下面看几个动词短语：
(1) let up(不及物动词+副词):
a. to diminish, slacken, or stop (变弱，变松，或停止)。
b. (foll .by on) informal to be less harsh (towards someone) （后接on）非天上式，表示“对某人不那么苛刻”。
(2) draw up:
a. To compose or write in a set form; write out:
以一种固定的形式作曲或写作；写出。例如：
draw up a contract (拟定合同)
draw up a list (拟定清单)
b. To bring (troops, for example) into order.
使（例如部队）秩序井然。
c. To bring or come to a halt.
使处于或达到一种挂起状态。
d. To bring (oneself) into an erect posture, often as an expression of dignity or indignation.
使（自己）保持直立姿势，通常表示尊严或愤慨。
e. Chiefly Southern US To shrink when washed. Used of clothes.
(主要用于美国南部，用于衣服)洗衣服时缩水。
(3) bring up:
a. To take care of and educate (a child); rear.
照顾和教育（儿童）； 后部。
b. To introduce into discussion; mention.
引入讨论； 提到。
c. To vomit.
呕吐。
d. To cause to come to a sudden stop.
引起达到一种突然停止的状态。
(4) fetch up:
a. (intr; usually foll by at or in) informal to arrive (at) or end up (in):
(不及物动词，后面通常接at或in)非正式，达到或终止于。例如：
to fetch up in New York. （在New York安顿下来）
b. (Nautical Terms) (intr) nautical to stop suddenly, as from running aground:
(般海术语)(不及物动词) (般海的)突然停止，就像搁浅一样。例如：
to fetch up on a rock. (大岩石上突然停了下来)
c. slang to vomit (food, etc)
（俚语）呕吐(食物，等）。
d. (tr) dialect Brit to rear (children, animals, etc)
(及物动词，英国方言)养育(孩子、动物，等）。
(5) pull up:
a. To bring or come to a halt:
带到或者达到某种挂起或停止状态。例如：
The driver pulled the car up at the curb. (司机把车停在路边。)
The car pulled up in front of the hotel. (这辆车停在酒店门前。)
b. To approach and arrive at a destination:
接近或达到 某个目标。例如：
We watched the plane pull up to the gate.（我们看到飞机停在登机口。）
c. To increase or cause to increase in altitude:
在海拔高度上增加或引起增加。例如：
The plane pulled up just enough to miss the tower. (飞机停下来刚好错过了塔楼。)
d. To advance or regain position, as in a race.
前进或重新获得位置，如在比赛中。
e. To check the action of:
检查某种行为。例如：
The remark pulled him up short.(这句话使他突然打住。)
f. To reprove or rebuke:
责备或训诫
例如：
They were pulled up for wasting money.（他们因浪费钱而被训诫。）
g. Basketball To stop one's progress and bring the ball up above one's head in order to take a jump shot.
（篮球 ）阻止一个人的前进并将球举过头顶以进行跳投。
(6) break up:
a. to separate or cause to separate
分开或导致分开
b. to put an end to (a relationship) or (of a relationship) to come to an end
结束（一段关系）或（一段关系）结束
c. to dissolve or cause to dissolve; disrupt or be disrupted:
结束或导致结束； 扰乱或被扰乱。例如：
the meeting broke up at noon. (会议在中午结束。)
d. (Education) (intr) Brit (of a school) to close for the holidays
(教育)不及物动词，(英国的学校)假期结束
e. (Telecommunications) (intr) (of a person making a telephone call) to be inaudible at times, owing to variations in the signal:
(通信)(不及物动词) (关于某人在打电话时) 由于信息的变化，有时候听不清楚
f. informal to lose or cause to lose control of the emotions:
(非正式) 情绪失控或导致情绪失控。例如：
the news of his death broke her up. (他去世的消息让她崩溃。）
g. slang to be or cause to be overcome with laughter
（俚语）被笑声淹没
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