名词
中文翻译：系统性杀虫剂
同义词：
['systemic pesticide', 'systemic fungicide', 'systemic herbicide']
例句：
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1. The new systemic insecticide is more effective than the old one.
这种新的系统性杀虫剂比旧的更有效。
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2. The farmers used to use systemic insecticides to control the pests.
农民过去使用系统性杀虫剂来控制害虫。
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3.The systemic insecticide was sprayed on the crops to prevent them from being damaged by insects.
系统性杀虫剂被喷洒在作物上，以防止它们受到昆虫的损害。