dump as a ox 类似于汉语"笨得像驴一样"
nothing upstairs :empty headed "傻了吧唧的”
pin-up :指的是这个女孩美得像挂历中的美女一样，总让人想挂在墙上
keen :在美俚语中意为"good,fine"
go steady :to date sb of the opposite sex regularly and exclusively "成为关系确定的情侣"
casual kick :a casual relation ,not a serious commitment
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