1. One of my interpreters, a girl, once pointed to the building as we passed it in a car and said, "I helped to build that hall!"
    有一次，当我们驱车驶过大会堂时，我的一个翻译，一位姑娘指着大会堂说：“建造大会堂，我也出了一份力。”

2. It was very difficult to build and rebuild such a great wall over wild and distant country without any modern machines .
    没有任何现代机器, 在那荒无人烟, 遥远偏僻的土地上修筑和重修这样一座长城是非常困难的.

3. It took more than 100,000 slaves twenty years to build the Great Pyramid.
    10多万奴隶用了20年的时间才建成这座大金字塔。

4. It's cheaper to build radio towers than to string lines across mountain ridges,
    建造无线电发射塔要比翻山越岭架设线路更便宜。

5. Which hopes to use human DNA to build specialized proteins that may have some value as disease-fighting drugs.
    医学界希望能用人类脱氧核糖核酸（DNA）制成特别的蛋白质，这些蛋白质具有某种抗病药物的价值。

6. Four hundred thousand men worked for twenty years to build it.
    四十万人花二十年时间才建成了这座金字塔。