Word is the common factor underlying a set of forms, a unit of vocabulary, a lexical item, or a lexeme.

词是在一组形式之下的共同要素，是词汇的单位，是一个词条，或是一个词位。

youdao

If the sediment underlying a hydrate entraps natural gas, its acoustic velocity will become much lower, resulting in vivid characteristics of reflections.

若水合物下方的沉积物捕集了天然气，其声速会更低，由此产生的反射波具有鲜明的特点。

youdao

It occurs as a result of something underlying which can be potentially serious."

VOA: special.2009.09.02

Essentially what's going on here is the underlying Akkadian words, I guess, are awilum, mushkenum, and then a third category, slave.

本质上来说，这里所使用的是阿卡德的基础语言，也就是阿维鲁，穆什钦努以及属于第三级别的奴隶。

耶鲁公开课 - 旧约导论课程节选

We don't have an enormous difficulty grasping them, and it doesn't seem to me that our capability of grasping irony is founded on a necessary, underlying agreement.

我们在理解时不会用很大困难，而且我认为，我们理解讽刺的能力,是建立在必要的，潜在的共识之上的。

耶鲁公开课 - 文学理论导论课程节选

This sort of division, that turns the European economy into a tale of two worlds, reflects a deep underlying ideology, a vestige of the collapse Soviet model, which presumes that bureaucrats rather than markets know best how resources should be allocated.

FORBES: EU: A Collection of Capricious Brides

Motivation is the underlying reason a person has for acting or behaving in a particular way.

FORBES: Putting 'Employee Motivation' In Its Place

Yet there remains a strong underlying desire, in a region that has come to despair of ever breaking its multiple deadlocks, that regime change in America could reverberate positively here.

ECONOMIST: The Middle East and America's election