Propagation

(noun.) the spreading of something (a belief or practice) into new regions.

(noun.) the movement of a wave through a medium.

校对:马奇

• The fund was, of course, for the propagation and spread of the red-heads as well as for their maintenance. 阿瑟·柯南·道尔. 福尔摩斯历险记.
• A large number of individuals of an animal or plant can be reared only where the conditions for its propagation are favourable. 查尔斯·达尔文. 物种起源.
• His knowledge of the propagation of animals was, however , not sufficient to make him reject the belief in spontaneous generation from mud, sand, foam, and dew. 李贝. 西洋科学史.
• In the field of botany Aristotle had a wide knowledge of natural phenomena, and raised general questions as to mode of propagation, nourishment, relation of plants to animals, etc. 李贝. 西洋科学史.
• The liberal reward of labour, as it encourages the propagation, so it increases the industry of the common people. 亚当·斯密. 国富论.

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