空气密度更高

deliver aid───提供援助

Genseric───根泽里克

dead air───静气；闭塞空气；停滞的空气

denervate───v.切除神经

dense fog───浓雾

denser───adj.密集的；浓厚的（dense的比较级）；n.(Denser)人名；(英)登泽

sea air───海滨空气；海洋性气候

Then, methought, the air grew denser, perfumed from an unseen censer.───接着我觉得空气变得稠密，被无形香炉熏香。

That's easy enough to do with air, but water is a much denser medium.───在空气中很容易做到，但在水中这样密集的媒介中就难了。

Aerogels are literally amazing stuff, a class of solid materials so light they are barely denser than air.───凝胶真是令人称奇的东西，虽说属于一类固体物质，却很轻，密度不比空气大。

In a gravitational field this causes the denser air to sink and buoy up the less dense gas.