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The experiment in field proves that a part of extraction substance has a good effect on killing-insect.
田间杀虫试验证明其中一部位有良好的杀虫效果。
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The insect-killing machine has the advantage of better insect-killing effect.
本杀虫机具有杀虫效果较佳的优点。
She says the effect of disease is made worse by the buildup of insect-killing pesticides in bee colonies.
VOA: special.2011.05.24
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