Remember that these cells are relatively large compared to bacteria and so diffusion doesn't occur very quickly over this length scale.

要知道这些细胞相对细菌而言,还是比较大的,扩散作用在这种尺度上,发生得不是那么快

耶鲁公开课 - 生物医学工程探索课程节选

Back to this graphic again: unpredictable food supply occurred on the left but doesn't occur on the right.

再回到这张图,对左边的人而言,食物供给难以预计,而右边却并非如此

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The unseen, however, is the investment that doesn't occur so that windows can be fixed.

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The second phase doesn't occur until there's a period of well-being between the two phases.

CNN: "The Secret Life of Germs" author Philip Tierno

It doesn't occur to most of us to prepare for crises in advance.

FORBES: Magazine Article