。但接下来的十年里，这种不受欢迎的昆虫却卷土重来。科学家们对其原因提出了新理论。
Bed-bug populations collapsed in rich countries by the 1980s in the face of modern pesticides. But the following decade brought a resurgence of the unwanted insects. Scientists have a new theory as to why
经济学人
20世纪80年代，面对现代杀虫剂，富裕国家的臭虫数量锐减Bed-bug populations collapsed in rich countries by the 1980s in the face of mode
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