It takes place in a large hollow tree.

VOA: special.2009.11.27

And the poem goes on, and this is the tone of a poem. It's a poem of crisis, a poem of a kind of hollow speaker, someone who emerges as, more or less, buried alive. And this is supposed to reflect both personal crisis and a historical crisis.

然后这首诗继续娓娓道来，这就是诗歌的韵律,这是首关于危机的诗，关于一个有点言之无物的叙述者,最后活活烧死的诗，这恰好反映了,个人和历史的危机。

耶鲁公开课 - 1945年后的美国小说课程节选

You have a tube, a transparent--a tube--a hollow tube, and at the top of the tube you throw a ball through so it whips through the tube and it comes out.

用一根管子,一根透明中空的管子,从管子最上面,你丢进去一个小球,小球迅速穿过管子,飞出来

耶鲁公开课 - 心理学导论课程节选

"little guide to different types of snowflakes sectored plates and capped columns and hollow columns and all different types of crystals.

VOA: standard.2009.12.19

This tube, this hollow tube, which food passes through is made up of many, many epithelial cells which directly abut one another and would be a flat sheet except that it's rolled up into a tube.

这个管道,这个中空的管道,食物可以穿行其中,而它就是由许多许多上皮细胞构成的,上皮细胞一个连着一个,形成了一个平坦的细胞层,但实际上它们还在肠管中卷成管状

耶鲁公开课 - 生物医学工程探索课程节选

Using a hollow tube, they drill into the tree and extract a 5-mm wide cylinder that shows each ring starting with the most recent, just under the bark.

VOA: standard.2010.04.05