In Section III below, Yeats says, "Get all the gold and silver that you can"-- "Provide, provide!" But just as in Frost, this strategy isn't going to work.

在第三节里，叶芝说，获得你能获得的黄金和白银-,请拿出来，请拿出来！，但正像弗罗斯特，这个方法行不通。

耶鲁公开课 - 现代诗歌课程节选

So you build it with a material like silver and gold, and then you encounter the problems of society that your bridge might get stolen because somebody thinks they have a better use for silver and gold than your bridge.

但如果你用金或银这样的材料,你又会面对新的问题,你的桥会被偷走,因为有人认为金和银有比造桥更好的用途

耶鲁公开课 - 生物医学工程探索课程节选