1. These churchesa contained a large number of beautifully preserved frescoes as well.
    这些教堂里面藏有大量的保存完好的壁画。

2. There has been a growth in the number of students.
    学生的人数增加了。

3. The idea of colonising Mars----a world 160 times more distant than the Moon----will move decisively from the second phase to the third, when a significant number of people are living permanently in space.
    如果有相当数量的人永久性地住在太空，征服火星的计划 -- 一个比月球远160倍的星球 -- 就可以明确地从第2阶段进入第3阶段。

4. There are one hundred thousand million stars in our own Milky Way alone, and then there are three thousand million other Milky Ways, or galaxies, in the universe. So the number of stars that we know exist is now estimated at about 300 million million
    仅我们的银河系就有1000亿颗星，况且在宇宙中还有30亿个天河，即银河系。因此，我们所知道的现有恒星数目估计约有30亿X1000亿颗。

5. Things can go wrong on a big scale, as a number of people recently discovered in Parramatta, a suburb of Sydney.
    就像许多人最近在悉尼郊区帕拉马塔发现的那样，有时乱子会闹得很大。

6. Though a number of descents have been made, much of it still remains to be explored.
    人们多次进入洞内探险，但至今尚有不少东西有待勘探。

7. The survey revealed a large number of sources of noise that we really dislike. Lawn mowers whining on a summer´s day,
    这个调查揭示了我们所不喜欢的大量的噪间的来源：夏天呜呜作响的割草机，公寓楼里深夜聚会的喧哗声，

8. The editor at once sent the journalist a fax instructing him to find out the exact number of steps and the height of the wall.
    编辑立即给那位记者发去传真，要求他核实一下台阶的确切数字和围墙的高度。

9. Though he managed to take a number of brilliant photographs, he could not stay near the volcano for very long.
    尽管他设法拍了一些十分精彩的照片，但他却不能在火山附近停留太长的时间。

10. The discovery started scientists in many parts of the world on the search for new and better sulfas, and a number of them were found and perfected.
    这一发现促使世界许多地方的科学家去寻求更新、更有效的磺胺药，他们也确实发现了若干种磺胺药，并做了改进。