平庸的英文：
mediocrity
banality
commonplace

参考例句：

A shabby performance.
平庸的表演

The condition or quality of being banal;triviality.
平庸，陈腐平庸陈腐的状况或性质;琐事

He has a bland appearance.
他外表平庸.

I hate predictable men
我不喜欢平庸的人。

He was a mediocre writer.
他是位平庸的作家。

Something that is trite,obvious,or predictable;a commonplace.
平庸之事平庸陈腐的、明显的或可预见的事;平凡的事

He displayed a mediocre intelligence.
他在学校里智力平庸。

Drearily commonplace and often predictable;trite.
平庸的，陈腐的令人沮丧的且常为可预见的平庸陈腐;平庸陈腐的

A too ordinary advertisement would not stand out in competitive advertising.
平庸之作无法在广告竞争中立足。

Old towns disfigured by tasteless new buildings
古老的城镇被平庸的新建筑弄得很难看。

mediocrity是什么意思：
n. 平庸；庸人

An ordinary mediocre material
中等人材

The company abhors mediocrity.
这家公司淘汰庸才。

Fashion today is sloppy mediocrity.
如今的时尚品位低下，平庸无奇。

banality是什么意思：
n. 平凡,陈腐

The text is banal.
课文索然无味。

They enjoy the comfort and banal luxury of their dwelling
他们享受着舒适和庸俗奢华的住所。

Banal remarks, thoughts,sentiments,etc
平平常常的话语、思想、感情等.

commonplace是什么意思：
n. 司空见惯的事；老生常谈
adj. 平凡的，陈腐的

Jet travel is now a commonplace.
乘喷气式飞机旅行现在是寻常的事。

It's a mere commonplace thing.
那是件极平常的事。

Earthquakes will have become almost commonplace by this time.
地震在这时候已经变成司空见惯的事。