变式：据气象部门预报，一台风中心在直径是60km的某城市正南50km处以北偏东30°方向前进，问该城市是否会遭受台风的袭击？并说明理由。
12、每次称体重若重了。我就安慰自己肚子里的墨水又多了。
[Abstract] According to the correlative analyses on Chinese medicine essence， dosage forms and quality control level， it expounds the precise concept of Chinese medicine， and its quality advantages and characteristics in this paper， furthermore discusses how to achieve the ideal drugs and Chinese medicine quality precision in expectation. Base on the Chinese medicine essence， using the concept of nature medicine and its drug system to construct Chinese medicine effective material basis and its drugs， with the correlative analyses of whole view and reductionism， the problems of uncertainty quality of original natural medicinal resources and preparations may well be solved， and further with the macroscopic to microcosmic construction of drug system， the precision in expectations of Chinese medicine quality and higher production lever may well be achieved.