Denser tissue, such as cancer, appears bright and white, whereas less dense tissue, such as fat, appears dark or gray.

癌症之类的更致密的组织会显示为光亮的和白色的，反之脂肪之类没那么致密的组织就显示成黑暗的或灰的。

youdao

Yang is used to describe the opposite conditions: things that are less dense, lighter, higher, more obvious or superficial, more masculine, and more dynamic.

阳是用来形容那种相反的情况：不太稠密的，阳光的，更高的、更明显的或者更表面化的，更多的男性化和充满活力的。

youdao

The gas is much less dense than either the solid or the liquid .

气体的密度比固体和液体要小得多。

youdao

It depends on a recent body of work which suggests that the brain's white matter (the wiring that connects the main bodies of the nerve cells, or grey matter, together) is less dense and less abundant in the brain of an autistic person than in that of a non-autist.

ECONOMIST: Autism