Sorry, I'm a little slow on the uptake. I don't know what is wrong with my brain today.

不好意思，我反应有点慢。我也不知道我今天脑子怎么了。

Sometimes Tim’s a little slow on the uptake.

【slow，slowness】蒂姆有时理解得有点慢。

" Yes, " said Harry emphatically—why were they all so slow on the uptake, did they not realise how much a person bled when fangs that long pierced their side?

“很严重。”哈利强调地说——他们为什么领会得这么慢？难道不知道一个人被那么长的尖牙刺穿之后会流多少血吗？

I think there's a feeling from the defence industry side the governments have maybe been a bit slow on the uptake over this, but it's kind of slowly filtering through.

我认为国防工业方面萦绕着一种氛围，政府对此的理解可能有点慢，但它正在慢慢渗透。