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“这两大杀虫剂在吾国已盛行了。虽然这方面的文字散见於各种书报上的也已很多,但像这里作综合研究的两篇文章,仍值得推荐,供各位参考。
"These two major pest control agents have prevailed in our country, and though there are many words in this regard, it is still worth recommending for two articles like the one we have studied here .