English is one _________ that students all have to get over in college days.
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Chang Jae-Hyuk chit ________ with his friends for a while and then go to one of school cafeterias for lunch.
Chang Jae-Hyuk finds his _______ sitting in the corner, but he doesn't have the guts to speak to her.
给对称形体工件划线,以对称中心平面的两个基准面精加工后,按照这两个基准面之间的()尺寸及对称要素的要求尺寸计算得出。
由于凸凹体的设计基准是对称中心线,而测量基准为外形,因此必须采用()方法来控制有关工艺尺寸。