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1.drain into 流入
Agricultural fertilizers often drain into aquatic ecosystems and spur a frenzy of growth.
通常，农业化肥流入水生生态系统，促使生物急速的生长。
2.teem with 富于；充满
This newspaper teems with misprints.
这份报纸满是印刷错误。
3.evolve from 由…进化
At this time science only perceives perhaps the earliest changes in DNA that are beginning to evolve from 2 to 12 strands.
此时，科学家可能只觉察到DNA里最早期的变化，它们开始从2股进化到12股。
