1. Every solid object will reflect a sound, varying according to the size and nature of the object.
    任何固体者反射声音，反射的声音因物体的大小和性质的不同而不同。

2. Even the boom that happens when the jet breaks the sound barrier went unnoticed.
    也察觉不到飞机冲破声障时发出的隆隆声。

3. For their house, which had sound foundations, would have stood stoutly even if it had been almost submerged.
    因为他们的房子地基牢固，即使洪水几乎灭顶也不会倒塌。

4. The Sahara Desert is a natural barrier between North and Central Africa.
    撒哈拉沙漠是北非与中非之间的天然屏障.

5. These words sound too literary to give them colloquial currency.
    这些词文绉绉的，不能作为口语使用。

6. The animals were put to flight by the sight and sound of the hunters.
    野兽一看到猎人或一听到他们的声音就逃跑。

7. The deep river was an insuperable barrier to those who could not swim.
    对不会游泳的人来说，这条深河是无法超越的障碍。

8. The sound of martial music is always inspiring.
    军乐的声音总是激动人心。

9. Though the sound could be heard clearly, it took me a long time to react.
    虽然声音听得很清楚，可我过了好一会才反应过来。

10. Then the sound of rumbling thunder reached the watchers on the shore.
    岸上观众听到雷鸣般的轰隆声.