乍看之下，最初看到时
when first looking
At first glance I thought it was a dog (but I was mistaken). 乍一看我还以为是一条狗呢（但是我看走眼了）。
At first glance, they make an unlikely couple.
That looks like the house I grew up in, at first glance. But it's certainly bigger than mine, and has a different door now that I look more closely.
He appears, at first glance, like any other little boy running around the park.
At first glance, he could pass for a teenager, but then you look a bit closer.
See also: glance noun