我可以读得很好，我的写作也有了进步。
尽管我的棒球始终都打得不是很好，但在那个赛季结束时，我的确进步了。
Even though I never became very good at baseball, I did improve by the end of that season.
瓶颈阻止你的进步，即使你的剩余部分做的很好。
Bottlenecks are what prevent progress, even if the rest of your system is working splendidly.
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