Moving Bridges

美音、自然拼读、分级阅读与词汇复习

Drawbridges were the first moving bridges.

Drawbridges是最早移动的桥梁.

They were built to help defend castles.

建造它们是为了帮助防御城堡.

The bridges could be raised to keep attackers away.

可以架起桥梁让攻击者远离.

Today, bridges over rivers move to let ships pass by safely.

今天,河流上的桥梁移动 让船只安全通过。

There are many different types of bridges that move.

有许多不同类型的桥梁会移动.

Some bridges tilt up to open on one side.

一些桥梁倾斜到一边打开.

Some bridges have two pieces tilt up to open in the middle.

有些桥梁有两块向上倾斜到中间开通.

Some bridges fold up like an accordion.

有些桥梁像手风琴一样折叠.

Some bridges have a middle part that turns to make space on either side.

有些桥有中间部分会转弯来制造两侧的空间.

Some bridges have a middle part that lifts straight up into the air.

一些桥梁有一个中间部分,可以直接升入空中.

Some bridges have a middle part that lowers under the water.

有些桥梁的中间部分会降低水下.

Some bridges curl up to move out of the way.

有些桥梁会卷起来让路

Some bridges tilt to the side to make room underneath them.

一些桥倾斜到侧面 以在下面腾出空间。

All the bridges let big ships pass by safely.

所有的桥梁都让大船安全通过.