They cleaned upstairs, downstairs, inside, outside, until everything was clean.

他们把楼上、楼下、里面、外面打扫得干干净净。

youdao

Inside? Outside or overlapping?

内部？外部还是有交叉？

youdao

If you're with a group of coworkers or guests, it's considered polite to press and hold the "door open" button until everyone else is inside/outside the elevator, then let yourself in/out last.

如果你和一群同事或者客人一起乘电梯，按住住“开门”的按钮直到每个人都进入或离开电梯是一种基本礼仪。

youdao

A protective coating of colloidal silver is painted on the inside and outside of the filter to kill bacteria.

VOA: special.2009.06.22

so, essentially, they're establishing or controlling or changing the difference between the charge inside the cell and the charge outside cell.

因此本质上来说，它们制造或者控制或者改变,细胞内外电荷之间的电位差。

麻省理工公开课 - 化学原理课程节选

There's no point where the circulatory system crosses the boundary between being inside you and outside of you, it's totally internal.

循环系统绝不会,跨越人体的内外界限,它完全位于体内

耶鲁公开课 - 生物医学工程探索课程节选

"The pollution indoors is generally higher than outdoors, possibly because of an imbalance between the flow of pollutant from outside and its removal from inside to outside, " the researchers say.

BBC: Is your floor a health hazard?

Policy decisions both inside and outside America will determine whether this rebalancing is painful or easy.

ECONOMIST: America's economy

"Modern art keeps changing, so this section communicates between the inside and outside, " Park adds.

FORBES: Art and Seoul