1. The medieval town was fortified with a high wall and a deep moat.
    这座中世纪的城市用高墙深沟来加强防御。

2. There are many prawns in this sea.
    这个海里有许多明虾。

3. The boy went swimming in the deep lake regardless of his mother´s fears for his safety.
    那个男孩不顾母亲对他安全的担扰，跑到深湖中游泳。

4. This painting is a representation of a storm at sea.
    这幅油画表现的是海上风暴.

5. The sea ridges under the wind.
    海水被大风刮起滔天波涛。

6. They set sail on the sea.
    他们乘船出海。

7. The goods have been smuggled out by sea.
    货物已从海上走私运出去了。

8. The spaceship made a splashdown in the sea.
    宇宙飞船降落在海中。

9. The tunnel would be well- ventilated if tall chimneys were built above sea-level.
    假如高大的烟囱状通风管伸出海面的话，这条隧道的通风将是良好的。

10. The open sea was deep and mysterious, and anyone who gave more than a passing thought to the bottom confines of the oceans probably assumed that the sea bed was flat.
    无边无际的海洋深邃而又神秘，凡是稍稍想过大海海底的人大概都会认为海底是平坦的。