一、up run
二、up-bound
参考例句：
It is not reasonably practicable to offer her the original job back.
让她继续做原来的工作在情理上行不通。
He skins his leg when walking along the thorny path.
他在长满荆棘的小道上行走时擦破了腿上的皮。
"I was walking down the street, when I suddenly saw a car bump against a huge pine."
我在街上行走时，突然看见一辆轿车撞到一棵大松树上。
While walking along a side street, Dick was mugged by two youths.
狄克在小街上行走时,遭到来自背后的`两个青年的袭击。
"In the slow-bicycle race, they wobbled along the track with identical do-or-die looks on their faces.
在自行车慢行竞赛中,他们骑着车,摇摇晃晃地在跑道上行着,脸上都带着一副相同的破釜沉舟的神情。
run是什么意思：
n. 奔跑，跑步；旅行；趋势
v. 跑步，奔跑；逃跑；参赛；行驶；运转；（使）流动；管理
run the rapids.
冲过急流
Run (or Hold) with the hare and hunt (or run) with the hounds
两面讨好
He runs as quick as a deer.
他跑得跟鹿一样快。
He runs as fast as Paul.
他跑得和保罗一样快。
bound是什么意思：
v. 限制，束缚；（使）弹回，弹起，跳跃
n. 跃起；跳跃；界限，限制，范围
adj. 装订的，有封面的；结合的；用带子绑住的；有义务的；受约束的
Where are you bound for?
君将何之？
The persons bound by such a contract.
合伙人受此种契约限制的人
Keep it within bounds.
请把它保持在限制范围内。
You must bound your affection.
你必须束缚你的感情。
The book is bound in calf.
这本书用小牛皮做封面。
学识谷
