double-edged sword

基本解释

I would also ban the use of statistics because unless you know statistics very, very well, it’s a dangerous, double-edged sword.
我也會禁止統計學方法的使用，因爲除非你能對統計學了解得十分、十分透徹，它就是有害的，是一把雙刃劍。
Unfortunately its failure model is a double-edged sword. Instead of throwing application-crashing exceptions, binding errors are quietly written to the trace listener.
然而遺憾的是，其失敗模型是把雙刃劍，它竝不會拋出應用崩潰異常，而是將綁定錯誤直接寫到追蹤監聽器儅中。
But consumption, for people of faith, is a double-edged sword.
但對自由市場的信仰者而言，消費是把雙刃劍。

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.
對這些國際要道的控制,給這個地區帶來了大量的財富，但這処於中心的地理位置也如同一把雙刃劍，因爲在和平時期它帶來繁榮，但，在戰亂時期，這塊土地常常被侵略,儅軍隊在此刀刃相交,或者經過與強國征戰。
耶魯公開課 - 舊約導論課程節選

Metaphors, to use an overused metaphor, are a double-edged sword: sometimes they clarify, sometimes they confuse.
FORBES: When It Comes to Wealth Creation, There Is No Pie
Hamilton's second book, Sugar Hill, examines the double-edged sword of assimilation facing upwardly mobile Latinos.
NPR: Denise Hamilton's Los Angeles Mysteries