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For washing frequency, under normal circumstances, the best car once a week.
对于洗车频率，一般情况下，一周洗一次车最好。
youdao
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The show energy conservation effect of frequency control system is the best.
说明了变频调速系统的节能效果是最好的。
youdao
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The show energy conservation effect of frequency control system is the best.
说明了变频调速系统的节能效果是最好的。
youdao