Cause of the job, I need to be proficient in English and Japanese.
本人因工作需要，需精通英语、日语两种语言。
The children of immigrants tend to be bilingual and proficient in English, "by the third generation, the original language is lost in the majority of immigrant families".
移民的孩子往往会说两种语言，而且精通英语，“到了第三代，大多数移民家庭都丧失了原来的语言。”
They should be more than proficient in English by the time the $4.4 billion Shanghai Disney Resort opens in about five years.
等到5年后价值44亿的上海迪斯尼公园开张的时候，他们可能更加精通英语。
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