destructive firing meaning in Chinese

破坏性射击

But the adjutant returned half an hour later with the news that the colonel of the dragoons had already retired beyond the ravine , as a destructive fire had been opened upon him , and he was losing his men for nothing , and so he had concentrated his men in the wood
但是派往那处的副官过了半个小时就回头，传来了信息：骑兵团团长已经撤退到峡谷后面去了，因为他面对猛烈的火力，白白地丧失人丁，因此命令步兵下马进入森林中。