gain
单词辨析：
指通过后天努力或有目的的行动逐渐获得某种想要或需要的东西，如成就、利益等。
She gained a reputation as an international soprano.
她获得了“国际女高音”的美名。
He finally gained the rank of colonel.
他最终获得了上校军衔。
指通过自身持续不断的努力而获得某物，也指日积月累地获得知识、技能等。
How did the millionaire acquire his wealth?
这位百万富翁的财富是怎样得来的？
Step by step he acquired job experience.
他逐步获得了工作经验。
指通过长时间的艰苦努力而得到所需或盼望已久的东西，如成就、重要职位等。
He attained the position of President of Ford Motors.
他终于当上了福特汽车公司的总裁。
His painstaking efforts to attain his pilot's licence is praiseworthy.
他为获得飞行员执照所下的苦功是值得赞扬的。
普通用词，可指以任何方式得到某物，并非一定要经过努力。
They need to get help immediately.
他们需要立即得到帮助。
She got first prize in the recitation contest.
她获得朗诵比赛第一名。
She got nothing but trouble for her efforts.
她的努力不但徒劳无功，反而惹来一身麻烦。
相关例句：
This is a cynical manipulation of the situation for short-term political gain
这是为了获取短期政治利益而损人利己地对局势进行操纵。
Some people will gain weight, no matter how hard they try to slim
有些人无论多么努力地减肥，都会长肉。
Their efforts helped the hostages gain their freedom.
他们的努力帮助人质获得了自由。
The BMW started coming forward, passing the other cars and gaining speed as it approached
那辆宝马车开始赶上来，超过了其他车辆并且在逼近的时候开始加速。
If this is the standard to which I have to drop to gain membership, then count me out!
如果要加入就得降低到这一标准的话，那我就不参加了。
Is it utopian to hope that such iconoclastic ideas will gain ground?
希望如此有悖传统观念的思想会发展普及，这是不是太理想化了？