centimetre-gram-second unit system

例句：

1. 1. The book is 20 centimeters long.
   这本书有20厘米长。
2. 2. She measured the length of the wall with a ruler.
   她用尺子测量了墙的长度。
3. 3. The table is three centimeters wide.
   这张桌子有三厘米宽。
4. 1. We need to buy enough rice for our family of five.
   我们需要买足够的大米来供我们五口之家食用。
5. 2. The chef weighed the ingredients carefully.
   厨师仔细称量了食材。
6. 3. A kilogram of sugar is equivalent to 1000 grams.
   一千克糖等于一千克。
7. 1.The clock has a second hand that moves at a constant speed.
   这把钟有一个以恒定速度移动的秒针。
8. 2.The new system uses a different way of measuring time.
   新系统使用了一种不同的时间测量方式。
9. 3.The scientist used a second-hand watch to measure the time.
   科学家用一只手表的秒针来计时。