双语例句
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Objective: To evaluate the effeteness of argon laser in preventing the recurrence of pterygium.
目的：探讨低能量氩离子激光在防止翼状胬肉术后复发中的作用。
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If the charge system is implemented, the highway become exclusive in consumption and the economical effeteness is depending on the specific conditions.
如果对使用公路实行收费制度，则在消费上具备了排他性，至于收费方式是否经济依具体情况而定。