A: 你丈夫呢？

B: He's in the sales department.

B: 他在销售部上班。

A: There are several Americans in the sales department.

A: 在销售部有好几个美国人。

B: Yes, but you'll recognize him easily.

B: 是的，但是你会很容易认出他。

A: How's that?

A: 怎么认出他呢？

B: He's got a beard. He's the only one with a beard.

B: 他留着胡须。他是唯一留胡子的人。

1. If someone has a distinctive¹ appearance, you can promise someone else they'll recognize him: You'll recognize him easily. / You'll recognize him easily.
如果某人的外貌有显著的特征，你可以向其他人保证他们能认出这个人：You'll recognize him easily. /你会很容易认出他。

2. You can mention someone's unique characteristics: He's got a beard. / He's got a beard; He's the only person with a beard. / He's the only person with a beard.
你可以提到某人的独特特征：He's got a beard. /他留着胡须；/ He's the only person with a beard. /他是唯一留胡子的人。