He had a clownish sense of humour.

他有着滑稽的幽默感。

That's really silly clownish behavior.

那真是愚蠢的小丑行为。

That's very ridiculous and clownish, isn't it?

这是非常可笑和丑陋，不是吗？

The antics of wildebeests are often clownish and entertaining.

姿态古怪的牛羚常常叫人忍俊不禁。

Our heroes set off on a harmless jaunt but end up far below the surface chased by a clownish madman.

我们的主人公开始了一段有惊无险的旅程但是被一个滑稽的精神失常的人的追赶下结果远不像表面那样简单。