I resisted for a long time, because it looks so preposterous, but it's really much more comfortable.

我对此抗拒了很长时间，因为这样看上去很傻，可其实却很舒适。

youdao

A man at my time of life, and in my state of health, to risk the shock and the dangers of being flung suddenly into a different universe? I never heard anything so preposterous in my life!

我这把年纪，这种身体，要是突然被抛到另一个世界，能经受得住那种震动和危险吗，我这辈子还没听说过如此荒谬的事情！

youdao

The excuse he gave for his lateness was so preposterous that everyone laughed.

他为自己的迟到所编造的借口是如此荒谬，以至大家都感到好笑。

youdao

If these movies existed, then surely whatever measly story was bubbling in my brain was not so preposterous.

NEWYORKER: A Psychotronic Childhood

The whole thing is so preposterous that only someone with a Lewis Carroll-like imagination could have dreamt it up.

FORBES: Magazine Article

Gore's assertions that all is well with our military were so preposterous that they added to his credibility problem.

FORBES: Election Stranger Than Fiction