1.port的基本意思是“港口”“海港”,主要指人工港,可供各种船只停泊装卸货物,乘客上下船之用。
2.port引申还可表示“港埠”,即有港口的城镇。与表示地名的专有名词连用时专有化,首字母大写,如Port Said塞德港。

This is an excellent port being secure from every wind.这个海港是一个不论刮什么样的风都不会出危险的良港。
Our ship leaves port tonight.我们的船今晚出港。
A visitor arrived just as we were setting out for the airport. 我们正要前往机场时来了一位客人。
Ships must follow the channel into the port.船只必须沿着航道行驶进港。
The ship has been waiting to enter port for two hours.这艘船为入港已等了两个小时。
Lüshun is a city and port in the northeast of China at the tip of Liaodong Peninsula.旅顺是中国东北辽东半岛顶端的一个城市和港口。
There is only one port along this rocky coast.这个多岩石的海岸只有一个港口。
London used to be Britain's largest port.伦敦过去是英国最大的港埠。
New York and San Francisco are important American ports.纽约和旧金山是美国重要的港口城市。

port, harbour, haven
这三个词都有“港”“港口”的意思。其区别是:
1.harbour可指“天然港”,又可指“人工港”,强调为避风而有山或防波堤; port通常指“人工港”,不仅有港口设备,而且背靠城市,即“港市”; haven主要指为船只提供安全的地方,是船只的“避风港”“锚泊地”。例如:
It is a natural harbour.这是一个天然港。
The disabled ship was towed into haven.那艘失去战斗力的军舰被拖进了港湾。
2.harbour在专有名词中常后置; port在专有名词中常前置。例如:
The ship entered Port Qinhuangdao at dawn.这艘船在黎明时驶入秦皇岛港。
The ship is now in Yantai Harbour.这艘船现在停泊在烟台港。
3.harbour和haven都可用于比喻中,指“避难所”或“安全地方”; port无此义。例如:
My home is my harbour.家是我的避难所。

港内有很多条船。
［误］  There are many ships in the port.
［正］  There are many ships in port.
［析］  in port是固定习语,意为“在港内”, port前无定冠词。

［同义词］   harbour, harbourage, haven, seaport, asylum
［词源］  ＜古英语＜拉丁语portus (港口)