娴熟阶段 4 / On-the-fly 4
后坐力没有那么厉害吧！小伙子，抓稳一点
哪！看看那灿烂的笑容！大家都似乎很享受
这个过程。
Come on! There cannot be such recoil, can there? Get a
grip, young man! But look at that smile! We must have
enjoyed the process.
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前奏 / Prelude
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严肃学习 / Learning process
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娴熟阶段 / On the fly
