And the last one in the major pattern is a half step from B to C.
大调模式的最后，是一个从B到C的半音级。
Fourth step: technicians in half an hour to customer's residence (please wait).
第四步：技师在半小时左右到达客户的住所(请耐心等待)。
Step 4: technician in half an hour reach our customers accommodation (please wait).
第四步：技师在半小时左右到达客户的住所(请耐心等待)。
Step 4: technician in half an hour reach our customers accommodation (please wait).
第四步：技师在半小时左右到达客户的住所(请耐心等待)。
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