李说：“蚂蚁能够爬过干净的蜘蛛丝，但不能爬过存有生物碱的蜘蛛丝。”
Li says the ants were able to cross the cleaned silk but were unable to cross in the two cases where pyrrolidine alkaloid was present.
李说：“蚂蚁能够爬过干净的蜘蛛丝，但不能爬过存有生物碱的蜘蛛丝。”
Li says the ants were able to cross the cleaned silk but were unable to cross in the two cases where pyrrolidine alkaloid was present.
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