The spraying of pesticides can be carefully planned, but accidents, weather conditions that could not be foreseen, and pilot errors often cause much larger deposits of spray than they had anticipated.
杀虫剂的喷洒可以经过周密的计划，但意外事故、无法预见的天气状况以及飞行员的失误往往会导致比预期更多的喷洒量。
The spraying of pesticides can be carefully planned, but accidents, weather conditions that could not be foreseen, and pilot errors often cause much larger deposits of spray than they had anticipated.
杀虫剂的喷洒可以经过周密的计划，但意外事故、无法预见的天气状况以及飞行员的失误往往会导致比预期更多的喷洒量。
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