a double-edged sword

基本解釋

But consumption, for people of faith, is a double-edged sword.
但對(duì)自由市場(chǎng)的信仰者而言，消費(fèi)是把雙刃劍。
Relatives and close friends can be a double-edged sword, Mr Shoebridge says.
親屬和親密的朋友可能是一把雙刃劍，肖佈裡奇先生說(shuō)。
This is why dealing with obsolete electronics is very much a double-edged sword.
這就是爲(wèi)什麼処理過(guò)時(shí)的電子設(shè)備是一把雙刃劍。

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.
對(duì)這些國(guó)際要道的控制,給這個(gè)地區(qū)帶來(lái)了大量的財(cái)富，但這処於中心的地理位置也如同一把雙刃劍，因爲(wèi)在和平時(shí)期它帶來(lái)繁榮，但，在戰(zhàn)亂時(shí)期，這塊土地常常被侵略,儅軍隊(duì)在此刀刃相交,或者經(jīng)過(guò)與強(qiáng)國(guó)征戰(zhàn)。
耶魯公開課 - 舊約導(dǎo)論課程節(jié)選

Metaphors, to use an overused metaphor, are a double-edged sword: sometimes they clarify, sometimes they confuse.
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