Economists think of knowledge, unlike physical goods, as "non-rival" : use by one person does not necessarily preclude use by others.
经济学家认为知识并不像有形产品，是具有非竞争性的：一个人使用并不会排除他人使用。
His rival, Boyd, 53, said about two-thirds of Priceline's bookings are non-U.S.
他的竞争对手53岁的Boyd表示，Priceline三分之二的预订来自于美国境外。
His rival, Boyd, 53, said about two-thirds of Priceline's bookings are non-U.S.
他的竞争对手53岁的Boyd表示，Priceline三分之二的预订来自于美国境外。
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