a double-edged sword

基本解释

But consumption, for people of faith, is a double-edged sword.
但对自由市场的信仰者而言，消费是把双刃剑。
Relatives and close friends can be a double-edged sword, Mr Shoebridge says.
亲属和亲密的朋友可能是一把双刃剑，肖布里奇先生说。
This is why dealing with obsolete electronics is very much a double-edged sword.
这就是为什么处理过时的电子设备是一把双刃剑。

So control of these international highways brought a great deal of wealth to the area, but the central location was a double-edged sword, because in times of peace it would bring prosperity, but, of course, in times of war the land was perpetually invaded as armies would crisscross the land going off to do battle with the great powers.
对这些国际要道的控制,给这个地区带来了大量的财富，但这处于中心的地理位置也如同一把双刃剑，因为在和平时期它带来繁荣，但，在战乱时期，这块土地常常被侵略,当军队在此刀刃相交,或者经过与强国征战。
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