1. One centimeter is equal to ten millimeters. 2. Centimeter is a basic unit of length, with its English symbol being "cm," representing one-hundredth of a meter. 3. One centimeter is equivalent to 1/100th of a meter or 0.01 meters. 4. The conversion ratio between centimeters and millimeters is 1 cm = 10 mm, which is also equivalent to 0.1 decimeters or 0.01 meters. 5. Millimeter is another unit of length, with its English abbreviation being "mm"; 10 millimeters make up 1 centimeter, 100 millimeters equal 1 decimeter, and 1000 millimeters are equivalent to 1 meter. 6. In the International System of Units (SI), the main unit of length is the meter, represented by the symbol "m." 7. The precise length of the meter was defined by the 11th International Conference on Weights and Measures in 1960, based on the wavelength of radiation emitted by the krypton-86 atom during an energy level transition. 8. Since 1983, the length of the meter has been defined as the distance light travels in a vacuum in 1/299792458th of a second. 9. China adopts a length unit system consistent with the International System of Units, with meter as the legally binding unit of length.