详细解释:a. 刀耕火种的
详细解释：
slash-and-burn
adj.（形容词）Of or being a form of agriculture in which an area of forest is cleared by cutting and burning and is then planted, usually for several seasons, before being left to return to forest.火耕的：为农业的形式，通过砍伐和火烧清除掉一片森林，然后耕种，通常持续数个季节，之后让其还原为森林Drastic or destructive:激烈的，毁灭性的：例句：.The past few years of painful, slash-and-burn expense cutting have made top brokerage executives reluctant to revert to their former, profligate ways.(David Henry).过去几年来痛苦的费用削减已经让上层经纪业管理者不愿恢复过去奢侈浪费的经营方式.(戴维·亨利)