我一天看很多张名片。翻译成英文

I take a loot at many name cards everyday.

你的一天不是特指某天吧，是每天的意思吧。

I look at a large number of business cards every day .
楼上的 everyday 是形容词“每天的，日常的”的意思。

I look at many business cards in one day.

I look at many business cards in a day.