There is no method to measure time but time have to be measured.
时间是无法测量的，但又是必须测量的。
To modern time measure, people divide the surface of the earth into 24 time zones according to longitude lines. This method was established by the International longitude Conference in 1884.
到了近代，将地球表面按经线等分为24个时区，这是由1884年国际经度会议制定的。
Measure the effects of Tongshu capsule on clotting time by using capillary method.
用毛细管法测定通舒胶囊对凝血时间的影响。
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