A new study says a widely-used insecticide is damaging wild bee populations. Wild bees are important, because they pollinate crops and wild plants. Environmentalists in the United States and Europe say chemicals called neonicotinoids are causing a drop in the number of bees. These insecticides are among the most commonly-used worldwide. Farmers often use seeds treated with the insecticides.__________________________一项新研究表明,广泛使用杀虫剂对野生蜜蜂数量有伤害.野生蜜蜂很重要,因为他们对作物和野生植物授粉. 美国和欧洲的环保人士表示,新烟碱会引起蜜蜂属相下降. 杀虫剂广泛应用于世界各地.农民经常用杀虫剂喷种子.________________________
