翻译：四个人一起工作,一共生产270个零件.
如果A再多生产10个,B少生产10个,C生产的是其实际生产数量的的二倍,D只生产他所产零件数量的一半,那么四人生产零件的数量就会一样多.
那么C实际产了多少个零件?
1、A+B+C+D-270
2、A+10=B-10=2C+1/2D
解之得：C=30（ parts）
so ,Person C made actually 30 parts
英语翻译请翻译并解答 four people A,B,C,Dhave worked together and produ
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