分辨 Acquire, Gain, Obtain, Attain, Pick up

1. acquire 強調經過努力逐步累積獲得知識、才能、經驗、名譽。
During this period he acquired a reputation for being a good writer.

2. gain: to get something that is useful, that gives you an advantage, or that is in some way positive, especially over a period of time
The Nationalist Party have gained a lot of support in the south of the country.

3. obtain: to get something, especially by asking for it, buying it, working for it or producing it from something else to succeed in gaining possession of as the result of planning or endeavor

to obtain permission
In the second experiment they obtained a very clear result.
Sugar is obtained by crushing and processing sugar cane.

4. attain: to reach or succeed in getting something; to achieve經過不懈的努力獲得的結果，實現達成一目標，一般後面接表示抽事物的名詞，如 ambition, goal, objective, success, victory
We need to identify the best ways of attaining our objectives/goals.

5. pick up 指無意地、容易地「學會」知識、技能或「獲得」資訊。