look down: 俯视
Some hong kongers used to look down on mainlanders as poor cousins.
一些香港人曾经看不起大陆人，把他们视为贫穷的堂兄弟。
Did the snobs there look down on you, too?
那里的势利鬼也瞧你不起了吧?

in keeping with: 与…一致
Many of the plan's targets are in keeping with existing trends.
这项规划的许多目标是要保持当前的趋势。
In keeping with the republican orthodoxy, he eschews all talk of tax increases.
为了与党内人员保持一致，他尽量避免与增税有关的话题。

stuff up: 填塞
But it's not like reporters make this stuff up.
但这并不是记者们凭空瞎编。
Stuff up your ears, there is going to be a mighty bang!
赶快把耳朵捂起来，马上就要有砰地一声大响！