Eye-wash B 眼药水
B: Let's go to the auto car wash.
去给车子做自动清洗吧。
B: You need to wash it at least once a week.
你一个礼拜至少要洗一次才行。
Methods Suppose washing method a and method B. a: directly put medical instrument into automatic cleaning sterilizer, wash, sterilize and dry it step by step.
方法A洗涤法:将被清洗器械直接放入全自动清洗消毒器内按程序进行清洗、消毒和干燥。
She costs C for sure, that's a wash because B, the way we've worked things out, B was $2, C was $1, So B/2-C is a wash.
她承担C的成本,收益是零,因为B,按我们设定的金额,B是2美元,C是1美元,所以B/2-C是零
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