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fluctuate用法「fluctuate用法和短语」
求高人解答：fluctuate的用法！ 固定搭配：fluctuate betwee A and B，即在A和B之间浮动。例如：The electricity consumption fluctuate...
fluctuate用法「fluctuates」
price的用法与搭配，有人告诉俺吗？ 1) [uncountable and countable]the amount ofmoney you have to pay for something价钱...