sea

• 名词，指覆盖地球表面大部分区域的广大咸水体，比海洋（洋）小；也泛指海洋或大片水域。

A noun referring to a large body of salt water that covers most of the Earth's surface, smaller than an ocean.

不可数

1. Large body of salt waterA1formal

   A large area of salt water, smaller than an ocean, surrounded by land.

   海

   • The sea was calm and blue that morning.
   • They sailed across the Mediterranean Sea.
   • Many fish live in the sea.

2. Large amount or expanseB1informal

   A vast quantity or number of something, like a sea of people.

   大量

   • There was a sea of faces in the crowd.
   • She waded through a sea of paperwork.
   • The desert looked like a sea of sand.

   同义词abundancearraycrowdhostmassmultitudeprofusionthrong

3. Ocean (general)A2formal

   Used to refer to the ocean in general or maritime activities.

   海洋

   • He has traveled the seven seas.
   • The ship set sail on the high seas.
   • Life at sea can be challenging for sailors.

   同义词deepdrinkmainocean