1.obtain用作及物动词时基本意思是指花费了大量的努力或经过了很久的时间后得到了心仪已久的东西。可接简单宾语,也可接双宾语,其间接宾语可以转化为介词for的宾语。可用于被动结构。
2.obtain有时也可用作不及物动词,意为“通行”“流行”,其主语常常是风俗、习惯或规则等。

obtain from(v.+prep.)
从…得到 get (sth) from〔out of〕
▲obtain sth from sth
We obtained a loan from the government.我们得到一笔政府贷款。
◇ 用于be ～ed结构
Some of the salt that we use is obtained from the sea.我们用的盐有些是从海水中提取的。
Both of these books can be obtained from the Public Library.这两本书都可以从公共图书馆借到。

obtain through(v.+prep.)
从…中得到 get (sth) through (sth)
▲obtain sth through sth
We obtained knowledge through books.我们从书本中获得知识。

用作不及物动词
▲S+～(+A)
The custom still obtains in some districts.这种风俗在某些地方仍然流行。
Different laws obtain in different places.不同的法律适用在不同的地方。
The custom still obtains with most people.这种习俗在大多数人当中仍然流行。
用作及物动词
▲S+～+n./pron.
Where can I obtain the book?我在哪里能买到这本书?
He obtained a driver's license after three-month training.3个月培训之后,他获得了驾驶执照。
She obtained her degree in 1989.她在1989年就取得了学位。
He obtained a large sum of money by buying and selling houses.他通过买卖房子赚了一大笔钱。
People obtain knowledge and information through reading and studying.我们通过读书和学习获得知识和信息。
We wished to obtain first-hand information.我们要能得到第一手情报就好了。
At last, he obtained his father's pardon.他终于得到了父亲的原谅。
◇ 用于be ～ed结构
It can be obtained at the following prices.按下列价格就能买到这东西。
It may be obtained for two dollars.这东西两美元就能买到。
A fine view of London can be obtained here.从这里看伦敦可以看得很清楚。
用作双宾动词
▲S+～+pron./n.+n./pron.
His work obtained him a regular income.他的工作使他获得定期的收入。
This obtained him respect.这使他受到尊敬。
They obtained her degree in 1990.她在1990年获得学位。
▲S+～+n./pron.+for pron./n.
I think I know where I can obtain that rare book for you.我看我知道去哪儿给你弄到那珍本书。
What can Eby obtain for you?伊比能给你什么?

obtain, achieve, acquire, attain, earn, gain, get, secure, win
参见achieve条。