Kilometer (km), meter (m), decimeter (dm), centimeter (cm), millimeter (mm), silk rice (dmm), millet (cmm), micron (micron) (without} nanometer (nm).

1km= 1000m， 1m= 10dm， 1dm= 10cm， 1cm= 10mm， 1mm = 10mm， 1mm = 10cmm， 1cmm=65438

Unit of volume:

Cubic meter (m 3), cubic decimeter (dm^3), cubic centimeter (cm^3), cubic millimeter (mm^3), liter (l), milliliter (mL), and sometimes ml.

1m^3= 1000dm^3, 1dm^3= 1000cm^3, 1cm^3= 1000mm^3, 1dm^3= 1l, 1cm^3= 1ml, 1l= 1000ml。

Related information:

The order of area units from small to large is: mm? (square millimeters), centimeters? (square centimeter), dm? (square decimeter), m? (square meters), huh? (hectares), kilometers? (square kilometers). In the International System of Units (SI), the standard unit area is square meters (m2), and the area is a square area one meter long.

1 m3 = 1000 liter = 1000 cubic decimeter = 1 000,000 ml = 1000000 cubic centimeter = 1 000000 cubic millimeter.

1 liter = 1 decimeter cubic = 1000 ml = 1000 cubic centimeter = 1 000,000 cubic millimeter.

1 cubic feet = 1 (feet? ) =0.0283 cubic meters (m? ) =28.3 17 liters (liters) =28.3 17 cubic decimeter (dm? ) =283 17 cubic centimeter =283 17000 cubic millimeter.

Time unit is one of the seven basic units. Length, time, mass, quantity of matter, illumination, current and (thermodynamic) temperature are seven basic units. The time units in this entry are arranged in descending order of time.

Now the daily day and night is 24 hours, while in ancient times it was 12 hours. When western mechanical clocks and watches were introduced into China, people called the time points of China and the West "Da Shi" and "Shi Shi" respectively. With the popularity of clocks and watches, people forget "Da Shi", and "Shi" is still in use today.