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- Approx. 50 change gears for setting the number of teeth. 大约50个交换齿轮设置轮齿数。
- Diametral pitch: the number of teeth per inch of pitch-circle diameter. 径节---节圆直径每英寸长度上的齿数。
- Some cars have variable-ratio steering, which uses a rack-and-pinion gear set that has a different tooth pitch (number of teeth per inch) in the center than it has on the outside. 有些车的转向系角传动比是可变的，这种转向器采用齿轮齿条式，它在中间而不是外部，有不同的齿密度（每寸齿数）。
- The number of fish in coastal waters has decreased. 沿海鱼的数量已减少了。
- A number of new hats were on parade at the wedding. 在婚礼上见到有些人戴著新式的帽子。
- A number of satellites are now circling the earth. 一些人造卫星现在正环绕地球飞行。
- I seriously question a number of your assertions. 对你所坚持的说法，有几点我甚为怀疑。
- A considerable number of guests have come. 相当多的客人已经来了。
- A number of possibilities come to mind. 我脑里出现了好几种可能性。
- Only a limited number of places are available. 只有少数地方可供使用。
- The speed change between two gears depends upon the number of teeth on each gear. 两个轮之间速度的改变取决于每个轮上的数目。
- By extension, an array of any number of dimensions. 广义来说，矩阵可以是任意维数的数组。
- When a powered gear goes through a full rotation, it pulls the chain by the number of teeth on that gear. 当加电的轮旋转一周时,它根据轮上的数来拉动链条。
- The number of day lose through strike have fall. 因罢工而失去的工作日减少了。
- The number of your finger is ten. 你双手手指的总数是10。
- NOTES：1. Bottom diameter for even number of teeth, Caliper diameter for odd number of teeth. 注：1.;底径用于偶数齿，卡尺测量直径用于奇数齿。
- A number of (ie some) problems have arisen. 已经出现了一些问题。
- There was the population of all cities in the book, and the way to tell a girl's age, and the number of teeth a camel has. 书里面有各个城市的人口数，判断女人年龄的方法和骆驼的牙齿数目。
- A number of cables are needed in this project. 这项工程需要大量电缆。
- I have a number of important things to do today. 今天我有许多重要事情要做。
