意思是现成的、即买即用的，且暗示不是定制化的。 If a product is off the shelf, it can be used straightaway without any setting-up. 如果要完全理解这个词的来历，可以用off the shelf that you can use it immediately. 省略了后面的话。 类似的还有off-the-peg （现成的（衣服）） ps：注意使用时中间加横线连 ...
这是我在网上找到的解释 The term “vice versa” originates from Latin. It is composed of two Latin words: “Vice” – This is the ablative case of “vicis,” meaning “in place of” or “alternately.” “Versa” – This comes from the Latin verb “vertere,” meaning “to turn” or “to c ...
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