它们中大多数都是用于旅游运输：夏季需求比较高。
Most of them are used for tourists' transportation: in summer the demand is high.
它们中大多数都是用于旅游运输：夏季需求比较高。
Most of them are used for tourists' transportation : in summer the demand is high.
举例来说，自去年夏季以来，因需求骤降，空运及远洋运输费用猛跌了三分之二。
For instance, air freight and ocean shipping costs have plunged by as much as two-thirds since last summer as demand has fallen.
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