英文例句大全为您提供milking operation英文例句大全,milking operation英文造句,关于milking operation的英语句子,单词milking operation怎么造句,milking operation英文例句大全有哪些,哪些英语句子是关于milking operation,英语单词milking operation的句子,单词milking operation如何造句,milking operation怎么造句等。