Try alternating the anti-dandruff product with regular shampoo until the dandruff clears up, and then switch back to your regular shampoo.
用去屑产品替代常规洗发水，一旦头皮屑清除，就换回常规洗发水。
A professional basketball game was forty-eight minutes long, divided up into alternating possessions of roughly twenty seconds: back and forth, back and forth.
一场职业篮球赛的时间是48分钟，这48分钟被分为轮流攻守的许多个粗略的20秒：你攻我守，你守我攻。
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