33. 1 meter. The unit of length refers to the basic unit for measuring spatial distance, which is formulated by human beings to standardize the length. When measuring the length of a line segment, you need to select a line segment as the measurement standard and specify its length as 1, which is called the unit of length. 33 m 6 1 is 33.6 1 m, because 33 m =3300 cm, 3300 cm plus 6 1 cm =336 1 cm, 1 m = 100 cm. The units of length from big to small are: meter, decimeter, centimeter, millimeter, micron and nanometer, which are all adjacent in decimal system.