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first hand 英 [fə:st hænd] 　美 [fɚst hænd]

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first hand

phrase. 第一手的；直接的　

We agreed that since I have first hand experience I will be his coach to quit smoking.　我们都同意, 正因为我有关于戒烟第一手的经验, 所以我会教他如何戒烟.

One can imagine impression produced on soldiers and officers who know about guns at first hand.　所以，给那些了解枪械的士兵和军官的第一印象也就可想而知了。

Anything firsthand is directly experienced, so your firsthand knowledge of the new math teacher's purple hair comes from the fact that you've seen it with your very own eyes.

1. We agreed that since I have first hand experience I will be his coach to quit smoking.

我们都同意, 正因为我有关于戒烟第一手的经验, 所以我会教他如何戒烟.
2. One can imagine impression produced on soldiers and officers who know about guns at first hand.

所以，给那些了解枪械的士兵和军官的第一印象也就可想而知了。
3. After six years of research, policy experimentation, and first hand observation, we believe that environmentally sustainable industrial development is within reach," says Wheeler.

经过六年的研究、政策试点和第一手的观察，我们认为具有环境可持续性的工业发展是能够实现的。