Man has done more in five thousand years to alter the biologicalaspect of the planet than has nature in five millon .
人类在五千年期间所造成的地球生物面貌的变化比大自然在五百万年期间所造成的变化还巨大。
2
Biodegradability of organic compounds is an important aspect in the technique of biological treatment.
提要有机物生物降解性研究是生物处理技术的一个重要方面。
3
Methods of prevention and cure measure of forestry harmful biological control are very important. The author aimed at this aspect and put forward the corresponding measures.