栈桥，又称海堤或码头，是一种常见的水上建筑结构。它通常由坚固的材料如混凝土、钢铁等建造而成，用于连接陆地与水面，或是作为船只停靠的平台。栈桥在世界各地都有广泛的应用，尤其是在港口、旅游景点和沿海城市中。

栈桥不仅具有实用功能，还常常成为当地文化和风景的一部分。例如，青岛的栈桥是该市的标志性建筑之一，吸引了无数游客前来观光。栈桥的设计往往结合了美学和功能性，既方便人们通行，又为城市增添了独特的景观。

英文原文：

Pier Introduction (Chinese-English)

A pier, also known as a breakwater or dock, is a common water structure. It is usually made of sturdy materials such as concrete and steel, used to connect land with water or serve as a platform for ships. Piers are widely used around the world, especially in ports, tourist attractions, and coastal cities.

In addition to their practical functions, piers often become part of local culture and scenery. For example, the Pier in Qingdao is one of the city's landmarks, attracting countless tourists. The design of the pier often combines aesthetics and functionality, making it both convenient for people to pass through and adding unique scenery to the city.