dense

slow to learn or understand

学习或理解缓慢

lacking intellectual acuity

缺乏智慧

so dense he nr understands anything I say to him

他太笨了，我对他说什么他都不懂

nr met anyone quite so dim

从没见过这么阴暗的人

although dull at classical learning, at mathematics he was uncommonly quick"- Thackera

虽然在古典学习上很枯燥，但在数学上却异常敏捷。——萨克拉

dumb officials make some really dumb decisions

愚蠢的官员做出一些愚蠢的决定

he was either normally stupid or being deliberately obtuse

他不是很笨就是故意装傻

worked with the slow students

和慢学生一起工作

dim

dull

dumb

obtuse

slow

having high relative density or specific gravity

高相对密度或比重的

dense as lead

致密如铅

hard to pass through because of dense growth

由于生长茂密，很难通过

dense vegetation

茂密的植被

thick woods

茂密的树林

thick

permitting little if any light to pass through because of denseness of matter

由于物质密度大，几乎不允许任何通过

dense smoke

浓烟

heavy fog

大雾

impenetrable gloom

不可逾越的阴暗

heavy

impenetrable