“淡季/旺季”用英文怎么说？

淡季 slack season; dull season; off season

旺季 peak period; boom season; busy season

例句：下半年通常是港口的旺季。

The second half of the year is usually the busy season for ports.

许多航空公司都提供淡季打折。

Many airlines offer off-season discounts.