百度

Bǎi dù Baidu, Internet portal and search engine, www.baidu.com, listed as BIDU on NASDAQ since 1999

外推

wài tuī to extrapolate

工具

gōng jù tool; instrument; utensil; means (to achieve a goal etc)

教程

jiào chéng lecture course; teaching module at university; tutorial; textbook; course of study

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