新概念Lesson 17 The longest suspension bridge in the world 课后练习

新概念Lesson 17 The longest suspension bridge in the world 课后练习里的一篇短文：
The bridge I know best is called the Sydney Harbour Bridge. It joins either side of Sydney Harbour. From far away it looks like a great arch, but when you get near, you can see a great deck under the arch. It is made x0cof steel and supported by two towers. If you stand on the bridge early in the morning, you can see the Parramatta River to the west and the open sea to the east. At this time everything is quiet. During the day, however, the harbour becomes busy with small boats and large ships moving in all directions. I enjoy standing on the bridge at night when you see the magnificent Opera House looking like a great sailing ship. In the darkness you can see the city lights. 【In the stillness the traffic and the movement of the sea are the only sounds that can be heard.】
请问加中括号的句子怎么翻译啊？