attain [əˈteɪn]

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vt.达到，获得，完成

to reach or succeed in getting something; to achieve

I used the scientific method to attain this end. 我用科学的方法来达到这一目的。
His painstaking to attain his goal in life is praiseworthy. 他为实现人生目标所下的苦功是值得称赞的。