莽撞的英文：
obtrusion

You cheeky young cub!
你这莽撞的毛头小伙子!

A Brash newcomer disputed the age-old rules for admission to the club.
一个莽撞的新来者竟对存在已久的加入俱乐部的规定表示异议

A surly answer
莽撞无礼的答复

There have always been pushing parents.
总有莽撞的父母。

He works rashly.
他做事很莽撞。

Daring or reckless action.
莽撞大胆，鲁莽的行动

Recklessness invites disaster.
莽撞招致灾难。

He' s quite a lad / a bit of a lad
他可是个莽撞家伙

Perhaps I was too saucy and provoking
可能是我太莽撞无礼，咄咄逼人了。

Impertinently bold;impudent and saucy.
无礼的厚颜莽撞的;放肆的和无礼的

"Not the less, however, came this importunately obtrusive sense of change."
然而,那种起了变化的突出感觉仍然丝毫不减地纠缠着他。

"This is a very obtrusive lad! "said Mr. Gradgrind, turning, and knitting his brows on him
“这真是一个非常冒失的孩子，”葛擂硬先生转过身来向他皱着眉头说。

All this said, there are certainly some time-critical situations where users must be notified in an obtrusive, attention-demanding manner.
当然，也一定存在着十分紧急的情况，需要以一种突然且吸引注意力的方式来通知使用者。