There are four stages in the process of human civilization progress, which are the tool age, the agriculture age, the industry age and the knowledge age.

人类文明进程可以分为四个时代：工具时代、农业时代、工业时代和知识时代。

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The CARDS in the envelopes give different stages in the process of generating energy. Open the envelopes one at a time and put the CARDS in the correct order.

信封里的卡片描述了能源产生的各个阶段。每次打开一个信封，将卡片按照正确的顺序排列。

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The reason we have multiple steps and stages in the interview process is to collect as many data points as possible.

FORBES: Creating Context in the Interview Process

John McCain came nine percentage points behind in second place, proving again that the opinion polls are not to be trusted in the fluid early stages of the election process.

ECONOMIST: Politics this week

Thailand's foreign minister said recently that he supports democratization in Myanmar but that the process must go in stages, much as it did in Thailand over the last half century.

FORBES: Magazine Article