How much time do spiders spend in killing insects?
蜘蛛用多长时间消灭害虫？
How much of each year do spiders spend killing insects?
每年多久时间蜘蛛花在扑猎蜘蛛？
Spiders are busy for at least half the year in killing insects.
蜘蛛至少有半年在忙于吃昆虫。
Spiders are busy for at least half the year in killing insects .
蜘蛛每年至少有半年忙于消灭昆虫。
Spiders are busy (for at least half the year) in killing insects.
蜘蛛至少有半年在忙于吃昆虫。
Spiders are busy (for at least half the year) in killing insects.
蜘蛛至少有半年在忙于吃昆虫。
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