The little insects were crawling around, the plants were there. And come back and look at it, over a period of weeks, and see what's changing.

我可以看到昆虫爬来爬去，还看到有些植物，几个星期后，再来看，看看发生了什么变化。

普林斯顿公开课 - 人性课程节选

until there were flies crawling on it and bugs and mold.

直到那上面爬满了苍蝇和虫子，长满了霉菌。

布鲁克林的房价 - SpeakingMax英语口语达人

The innate immune system composed of neutrophils and macrophages; these are cells that are crawling around your body all the time ready to eat bacteria.

它由嗜中性粒细胞和巨噬细胞构成,这些细胞不断在周身蠕行,准备吞噬细菌

耶鲁公开课 - 生物医学工程探索课程节选