harbour 一般用词，指停泊船只、装卸货物的天然或人工港口。
port 多指人工港口，还可指有港口的市。
wharf 指船只停泊装卸货物的码头。
pier 专指与海岸成直角形而突出的码头，可供旅客，货物上下船或供人散步用。
seaport 指港埠。
参考例句
1. The hydrologist figured the water depth along a wharf piling. 水文工作者在码头桩上用数字标明水深。
2. The crowd that throngs the wharf as the steamer draws alongside is gay and debonair. 当轮船靠近码头时，蜂拥到岸边的人群兴高采烈而又彬彬有礼。
3. The engineering geology, large bottomless cylindrical structure, construction method and displacement analysis for Nansha Wharf are introduced. 文章介绍南沙码头的工程地质，无底大圆筒结构、施工方法、位移分析；
英英解释
n.
1. a platform built out from the shore into the water and supported by piles; provides access to ships
2. provide with a wharf
3. store on a wharf
4. discharge at a wharf
5. come into or dock at a wharf
6. moor at a wharf
网络释义
wharf 码头;
货运码头;
九龙仓集团;
晾焦台;
ex wharf 码头交货价;
目的港码头交货价;
码头交货价格;
码头交货,码头交货价格,目的港码头交货;
