妇女在婚姻中不平等的一个主要原因是，在大多数情况下，男人仍然是主要的经济支柱。

A major part of women's inequality in marriage has been due to the fact that, in most cases, men have remained the main breadwinners.

youdao

煤炭和天然气主要用于发电，而石油主要用于给运输提供能量，但所有这些能源的价格是相互关联的。

Coal and natural gas are mainly used for electricity generation, whereas oil is used mostly to power transportation, yet the prices of all these energy sources are linked.

youdao

在15世纪，印刷术得到发展，纸张成为欧洲书籍的主要材料，在此之前的主要材料是羊皮纸。

During the 1400s, when printing was being developed, paper became the predominant material for books in Europe, but prior to that, it was parchment.

youdao

They might ingest extracellular antigen, presented pieces of it on their cell surface in the context of MHC-2.

它们可以吞噬胞外抗原,根据细胞表面的,主要组织相容性抗原-2

耶鲁公开课 - 生物医学工程探索课程节选

And so, that was a clear major for me to pick -- I actually also was considering English and ended up being a minor in English.

所以这是我的主要选择之一-,我还考虑学英语,最后英语是我辅修的专业。

麻省理工公开课 - 化学原理课程节选

And so my individual paper and my presentation was more on public universities and how they should respond to undocumented immigrants, and specifically whether they should offer them in-state tuition.

所以我的论文和报告,主要谈论的就是公立大学,如何对待那些无记录的移民，尤其是，他们是否,能够只付州内学费。

普林斯顿公开课 - 人性课程节选