难解的英文：
obscureness

Sphinx's riddle.
难解之谜（狮身人面的怪兽提出"什么动物早晨四条腿,中午两条腿,而晚上三条腿"的谜语）。

a difficult puzzle.
难解的谜语

A profound doctrine
难解的学说

A bottomless mystery
难解的谜

A difficult puzzle
难解的谜语

A bottomless problem
深奥难解的问题

I don't think this sum is difficult to come out
我不认为这道算术题难解。

Questions about spectra are likely to be recalcitrant.
有关谱的问题多半是难解的。

The parable of Pythagoras is dark, but true
毕达哥拉斯底格言是难解而真确的

He wore an inexplicable expression.
他脸上流露出让人难解的表情。

An obscure poet;an obscure family.
不出名的诗人；卑微的家庭

To obscure;eclipse.
使黯然失色；使相形见绌

The moon was obscured by the clouds.
月亮被云遮暗了。

It is written by an obscure young poet.
这是一位不知名的年轻诗人写的。

It was an obscure night in early May.
那是五月初的一个朦胧的夜晚。