本期內(nèi)容：

"There's no guarantee that Amazon.com can be a successful company. What we're trying to do is very complicated," said Jeff Bezos in 1999, just five years after launching the online firm.That the firm's founder was so uncertain of its future seems surprising. Today, 25 years on from when it started, Amazon is one of the most valuable public companies in the world, with Mr Bezos now the world's richest man, thanks to his invention.

guaranteevt. 保證
complicated: adj. 復(fù)雜的
founder: n. 創(chuàng)辦者
uncertain: adj. 不確定的
public company: 上市公司
thanks to: 因?yàn)椋╠ue to，because of）

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