In black-spotted dogs the spots are dense black.

黑色斑点的狗，斑点是浓重的黑色。

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The dispersed figures had come together on the sand and were a dense black mass that revolved.

四散的人影在沙滩上汇聚拢来，变成了旋转着的浓黑的一团。

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By using dense black ink and creating stereo feeling, the painter shows Huangshan's magnificence and peculiarity. It is not enough to show the majestic mountains.

厚重苍遒、氤氲华滋的笔墨，在营造画面立体感的同时，又凸显出了黄山的雄伟与奇崛。

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Not to mention vats of rainbow-hued fish roe, dense black loaves stuffed with shoals of tiny fish, and the famous Finnish apple pie.

BBC: Postcard from Helsinki, Finland

The entire city of Fort Worth sits over a gas dense layer of black rock called the Barnett Shale that only recently became possible to access.

NPR: Drilling for Gas in Dallas-Fort Worth

Black holes are so dense that they do not even let light out.

WSJ: Matt Ridley on the Higgs Boson | Mind & Matter