他用脚踩住最底下的横档稳住梯子。

He put his foot on the bottom rung to keep the ladder steady.

《牛津词典》

剧院底下的四层停车库还不够。

Four levels of parking beneath the theatre was not enough.

《柯林斯英汉双解大词典》

当它消失在船头底下的时候，我屏住了呼吸。

As it disappeared under our bows I held my breath.

youdao

Not Milton himself would cry up liberty to poor female slaves or plead for the lawfulness or resisting a private tyranny.

即便米尔顿本人也不愿为那些女奴的自由所呼号,辩解，或是反对这种私底下的暴行“

耶鲁公开课 - 弥尔顿课程节选

Moving a stack of size 3, again, if I want to go over there, I need to make sure I can put the spare one over here before I move the bottom one, I can't cover up any of the smaller ones with the larger one, but I can get it there.

移动上面的三个圆盘的话，我在移动最底下的圆盘之前，同样要确保剩下的,是在另外一个柱子上，因为我不能把大的圆盘,放在小的上面。

麻省理工公开课 - 计算机科学及编程导论课程节选

And also that we know that the zero does not count as a node, if per se I actually had managed to hit zero in drawing that, so the correct answer would be the bottom one there.

另外你们要知道零点不是节点，假设说我确实把零点画成０了，那正确的结果就是底下这个。

麻省理工公开课 - 化学原理课程节选