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investigation into sth
an official examination of the facts about a situation, crime, etc.
(正式的)调查,侦查
a criminal / murder / police investigation
刑事/凶案/警方调查
The police have completed their investigations into the accident.
警察已完成对这次事故的调查。
She is still under investigation.
她仍在接受调查。
erect
to put sth in position and make it stand vertical
竖立；搭起
同义词：put sth up
Police had to erect barriers to keep crowds back.
警察得设立路障来阻截人群。
to erect a tent
搭帐篷
substitute
substitute for sb
substitute for sth
a person or thing that you use or have instead of the one you normally use or have
代替者；代替物；代用品
a meat substitute
肉食替代品
Paul's father only saw him as a substitute for his dead brother.
保罗的父亲只是把他当作他死去的哥哥来看待。
a substitute family
收养家庭
The course teaches you the theory but there's no substitute for practical experience.
这门课教的是理论,但没有任何东西能代替实践经验。
