sea/seagull/seaman/seaweed

sea /si:/ n.［c］海洋，海：the East Sea 东海；the Red Sea 红海；2000 feet above the sea 海拔2000 英尺 at sea 出海，航海；困惑，不知所措：He feels at sea with economics.他对经济学一窍不通。by sea 由海路，乘船：He travelled to New York by sea. 他乘船去了纽约。(cf. by the sea 在海边; go to sea 去当水手; go to the sea到海滨去)  a sea of …大量：a sea of faces大量的面孔

 seagull /ˈsi:ɡʌl/ n. [c] 海鸥：The seagulls circled overhead. 海鸥在上空盘旋。Seagulls followed in the wake of the huge ship.海鸥尾随于大船之后。And today, if you go to Salt Lake City, you can see a monument with seagulls on top of it.今天，如果你去盐湖城,你会看到有一座顶端雕刻有海鸥的纪念碑。

seaman /ˈsi:mən/ n. [c] (pl. seamen) 水兵，水手，海员：That young man is an experienced seaman.那个年轻人是一个经验丰富的水手。He's the best seaman on the coast.他是这一沿海地区最棒的航海手。

seaweed /ˈsi:wi:d/ n. ［u］海藻，海草：The underside of the rock was covered with seaweed.岩石的下面布满了海草。The seaweed felt cold and slimy.海藻摸起来冷冰冰黏糊糊的。