1.In October 1838, I happened to read for amusement Malthus on Population, and being well prepared to appreciate the struggle for existence which everywhere goes on, from long continued observation of the habits of animals and plants, it at once struck me that, under these circumstances, favorable variations would tend to be preserved, and unfavourable ones to be destroyed.
2.Although it has been possible to infer from the goods and services actually produced what manufacturers and servicing trades thought their customers wanted, only a study of relevant personal documents written by actual consumers will provide a precise picture of who wanted what.
3.Economic development depends on the extraction of natural resources and on low-skilled labor, which has resulted in a weak manufacturing base and uneven distribution of wealth. Agriculture still accounts fol the major share of rural household income and employs over 60 percent of Africa' s labor force, particularly women. Low agricultural productivity continues to threaten food security in Africa as a whole. Africa needs a green, clean industrialization that leapfrogs outdated, polluting processes and platforms and benefits from new technologies. Inclusive and sustainable industrialization is a key stepping stone towards sustained economic growth, food security and poverty eradication in Africa. 参考译文：