# 学中文【长度单位】📏Units of Length in Chinese 用汉语写km千米/cm厘米/mm毫米

Units of length , 长度单位 , cháng dù dān wèi 。
mm , 毫米 , háo mǐ 。
cm , 厘米 , lí mǐ 。
dm , 分米 , fēn mǐ 。
m , 米 , mǐ 。
km , 千米 , qiān mǐ 。
km , 公里 , gōng lǐ 。
inch , 英寸 , yīng cùn 。
feet , 英尺 , yīng chǐ 。

The unit of length refers to the basic unit for measuring the spatial distance, and is the basic unit formulated by humans to regulate the length. Its international unit is “meter” (symbol “m”), common units are millimeter (mm), centimeter (cm), decimeter (dm), kilometer (km), meter (m), micrometer (μm), nanometer (Nm) Wait. The unit of length plays an important role in various fields.

To understand the unit of length, we must first understand its upper concept-unit. The interpretation of “unit” in “Modern Chinese Dictionary” is: the name of the standard quantity for measuring things. In the measurement, a certain quantitative of the same quantity is used as the reference quantity to determine how many times the known quantity is equivalent to the reference quantity, and the reference quantity is called the unit. For example, the centimeter is the unit of measuring length, the gram is the unit of measuring mass, and the second is the unit of measuring time. As an example of mathematics, it can also be said that 1 is the unit of natural numbers, and the fraction whose numerator is 1 is the unit of fraction.

When measuring the length of a line segment, a certain line segment needs to be selected as the measurement standard, and its length is specified as 1, and this line segment is called the unit of length. There are many length units, the main unit is meters, and the rest are derived units. When measuring, select the appropriate length unit according to actual needs. For example, the length of the runway is measured in meters, the distance between two cities is measured in kilometers, and the distance of long jumps is measured in centimeters, and so on.

1丈=10尺；1尺=10寸；1寸=10分；1分=10厘；
1丈≈3.33米；1尺≈3.33分米；1寸≈3.33厘米；
1千米(km)=1000米；1米(m)=100厘米；1厘米(cm)=10毫米；
1里=150丈=500米；2里=1公里(1000米)。 Thanks! myGiantPanda.com  