When using commas to separate items in a list, place a comma before the conjunction that precedes the last separate item in the list, unless that last item is a compound term.
当用逗号来分隔列举的项目时，在名单的最后一个项目之前前的连词前面加逗号。
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"Duct tape" is often pronounced "duck tape" - indeed, it comes as a surprise to many Americans to discover what the correct term is for this common household item.