渐渐地你自然会明白怎么区分它们，但是你就是解释不了为什么你知道或你是怎么知道它们之间的区别的。
By and by you will just naturally know one from the other, but you never will be able to explain why or how you know them apart.
你能解释它们的区别并告诉我应该用哪一个吗？
Can you please explain the difference and which one I should use?
你能解释它们的区别并告诉我应该用哪一个吗？
Can you please explain the difference and which one I should use?
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