The control effect of DDVP . carbaryl and cypermethrin smoke agents were 95.85 % 31.51 % and 97.66 % respectively. 西维因烟剂防治效果为 31.51%,氯氰菊酯烟剂防治效果为97.68%.
她撕掉包装纸，抽出一支烟，点燃了。She tore off the cellophane, pulled out a cigarette, and lit it.将贴纸撕掉。Peel away the sticky paper.玛丽·安撕掉了餐巾的边儿。Mary Ann tore the edge off her napkin....
The Commission for Racial Equality teaches organisations not to discriminate.种族平等委员会告诫各家机构不要心存歧视。They can discriminate hundreds of colours.他们能分辨上百种颜色。The device can discriminate between the cancerous and the normal cells...