有害 harmful; pernicious; detrimental 对健康有害 harmful to one's health; 土壤里的石灰对某些植物有害。 lime in the soil is detrimental to some plants.; 有害废物 harmful waste; 有害粉尘 harmful dust; 有害气体 harmful gas; pernicious gases
Ddt sprayed into the air kills mosquitoes and other insect pests 喷射到空气中的ddt能杀死蚊子和其他有害昆虫。
Spider insecticidal protein ( sip ) gene can encode a small polypeptide containing 37 amino acids . the polypeptide has strong toxicity to many insects 蜘蛛杀虫蛋白( spiderinsecticidalprotein , sip )基因可编码一种只有37个氨基酸的小肽,该多肽能杀死多种有害昆虫。
Next week we will discuss how some plants help each other through their root systems and discuss how some plants attract help insects that feed on harmful insects 下周我们将讨论一些农作物如何通过它们的根部系统来相互帮助,以及他们如何吸引那些以有害昆虫为食的有益昆虫。
" in a nutshell … the presence of these birds in pine forests increased the growth of the trees by helping to rid them of damaging insects , " said kailen mooney , an evolutionary biologist at the university of colorado at boulder 简而言之… …松林里有鸟儿存在,可增加树木的生长,因为鸟儿帮树木除掉有害昆虫,柏德市科罗拉多大学演化生物学家穆尼表示。
Meanwhile , overall prevention and control measures ( environment conditions , geological location , etc . ) should be adopted based on practical conditions ( environment harnessing , ecological prevention and control , physical prevention and control , and chemical prevention and control , etc . ) and insect ecology to keep the harm of pests at acceptable level 同时结合实际情况(环境条件、地理位置等) ,以昆虫生态学为基础,将有害昆虫采用综合防治措施(环境治理、生态防治、物理防治、化学防治等一切有效手段)控制于不足造成危害水平。