The household structure of a Roman household was this-- and I say "household," because our word "family," which we usually take to mean the biological family: the father, the mother, the children, maybe the grandchildren, maybe the extended family.

罗马人的家户结构是。。。,我用“家户“是因为“家庭“,通常是指有血缘关系的亲人：,父亲，母亲，孩子，可能还有孙辈，大家庭。

耶鲁公开课 - 新约课程节选

How many hours do the students take classes usually?

学生们通常上几小时的课？

很好奇住宿生活 - SpeakingMax英语口语达人

And so it's usually the case that you can get a higher return if you're willing to take more risk.

同样很常见的例子是,所以如果你愿意冒高风险,你可能就会有高回报。

麻省理工公开课 - 计算机科学及编程导论课程节选

What they usually do is they take the underperforming fund and they merge it with one that has a better track record.

更常见的做法是把运作不佳的基金,合并到另一只表现良好的基金中去

耶鲁公开课 - 金融市场课程节选

One of the ways that it's used is to take the fertilized egg from an animal, a mouse, usually it's a mouse and inject in a vector that contains a gene that is involved in human disease of some sort.

其中一种应用就是,从动物,一般是老鼠体内取出受精卵,注入某种质粒,这种质粒带有与某些人类疾病相关的基因

耶鲁公开课 - 生物医学工程探索课程节选

When we talk about space, what we usually refer to is, how much computer memory does it take to complete a computation of a particular size?

我们经常指的是，当我们计算，一个特定大小的问题的时候,要占用计算机的多少内存？

麻省理工公开课 - 计算机科学及编程导论课程节选