管理员摘要：
例句： He's gone AWOL from his base. 他从基地开了小差。 He acted from base motives. 他的行为动机卑鄙。 He didn't make it past first base. 他未能跑过一垒。……
例句：
He's gone AWOL from his base.
他从基地开了小差。
He acted from base motives.
他的行为动机卑鄙。
He didn't make it past first base.
他未能跑过一垒。