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Sometimes it takes 4 or 5 years in order to get some level of competency.
有时候它需要4到5年才能达到一定的水平，
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- 来自原声例句
Sometimes it takes 4 or 5 years in order to get some level of competency.
有时候它需要4到5年才能达到一定的水平，
应用推荐