One important note: performance tuning is very system specific.
一项重要说明：性能调优与系统具有密切关系。
This "thank you note" is very important, especially since it is not common in Chinese culture.
这封感谢信十分重要，当然这和申请中国大学的习惯有些不同。
It is important to note up-front that regular expressions, while very powerful, also have limitations.
必须指出的是前期的正则表达式，而非常强大的，也有局限性。
Two things are very important to note here.
在此，有两点非常重要，必须引起注意。
Two things are very important to note here.
在此，有两点非常重要，必须引起注意。
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