We might even go further and argue that history has become a sub-field of biology, focusing on the behaviour of one animal, Homo sapiens.
我们可能需要更加深入地把历史学当作生物学的分支学科来研究,专注研究一种动物的行为表现,那便是智人。
As he laboured in each field-consumer behaviour, public finance, international trade, business cycles-he encountered similar problems, which yielded to the same set of mathematical techniques.
当他在各领域—包括消费者行为、财政学、国际贸易、商业周期—辛勤耕耘时,总是遭遇到一些类似的、屈从于数学技巧的同一局限的问题。
The exact solution of time behaviour of the two-level atom interacted with two-photon field is obtained.
本文研究在双光子场作用下二能级原子时间行为的精确解。
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