at first glance: meaning and explanation
at first glance = when you look at something for the first time
This is usually used to communicate a first impression, before you have looked more carefully. e.g At first glance, everything looks fine = everything looks fine but I will need to check more carefully to make sure.
This expression might often be used to contrast a first impression with a subsequent change in opinion. e.g. At first glance I thought it was my old teacher, but then I realised it must be someone else – he wasn’t old enough.
Have a go at these micro-dictation exercises to hear this expression being used in context – how much can you understand?
Accent: Northern England
About the sentence
…if a deal seems too good to be true…
The expression too good to be true is used to describe something which seems so perfect that you expect something to be wrong. It is probably better than you expected, which makes you suspicious.
We use this expression in the following piece of advice: If you think something is too good to be true, then it probably is.