If Jim the leader was neither born nor made, where did this come from? How did this gangly, awkward man learn to lead? What was the source?

如果吉姆的领导能力既非天生也不是后天得来的，那它到底从何而来？这个身材瘦长、有些笨拙的人如何学会领导？秘诀是什么？

youdao

Incomplete combustion is the principal source of man-made carcinogens.

不完全燃烧是人为致癌物的主要来源。

youdao

India is a source of untapped resources, both natural and man-made.

印度是一个自然和人造资源都尚未开发的资源来源。

youdao

The ability to detect man-made interference is not much use unless the source can be located, however.

ECONOMIST: GPS jamming