scorched earth

基本解釋

Opposition activists said Syrian troops had adopted a scorched earth policy in Jisr al-Shughour.
反對派活動積極分子稱，敘利亞軍隊對吉斯爾?舒古爾(Jisr al-Shughour)實施了焦土政策。
Even an AT&T move would likely be seen as "scorched earth" policy as it would encourage other carriers to cut prices and give customers little reason to switch networks but still hurt revenues.
此前AT&T曾鼓勵其它的運營商學習自己，降低手機的網(wǎng)絡服務費，以保證自己的客戶不會轉(zhuǎn)而選擇其它的運營商，不過這種做法被業(yè)界普遍認為是一種弊大于利的 “焦土政策” 。
cnbeta.com
He abandoned theories like scorched earth in the forest.
他放棄了一個個像林中焦土似的學說。

The ONLF accused the troops of conducting a 'scorched earth' campaign, a claim that was strongly denied by the government.

Pereda took a sip—it tasted of scorched earth and stones—and left the glass on the bench.
NEWYORKER: The Insufferable Gaucho
Despite the legal scorched earth, there could still be a deal between the two warring moguls.
FORBES: Diller Won't Go Quietly From IAC
In April, Otellini set in motion the most extensive restructuring in two decades for Intel (See "Scorched Earth").
FORBES: Otellini To Cash Some Of Intel's Chips?

A scorched earth policy is the deliberate burning, destruction, and removal by an army of everything that would be useful to an enemy coming into the area.