Some people never grow up but get stuck in one phase or another of human development.

有些人永远不会长大，而是卡在了常人成长的某个阶段。

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Status: Possibly entering Phase II (human) trials this fall

现状： 今年秋天可能进入第二阶段（人类）试验

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The present WHO level of pandemic alert remains at phase 3: human infections with a new virus subtype are occurring, but the vast majority of these infections are acquired directly from animals.

目前世卫组织的大流行预警级别仍然为第三阶段：人类感染新亚型病毒，但是这些感染中的绝大多数是直接从动物那里获得的。

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Phase five is marked by human-to-human spread of the virus into at least two countries in the same area of the world.

VOA: special.2009.05.06

Flurizan completed Phase 2 human trials in Alzheimer's patients, and it is also in Phase 2-b human clinical trials for treating patients with pre-metastatic prostate cancer.

FORBES: Magazine Article

At Merck, where Jansen runs the program to create an HPV vaccine, scientists are expected to begin final-phase human trials of one promising candidate.

FORBES: Cornering A Killer

In 2001: A Space Odyssey, space travel led to the next phase of human evolution.

FORBES: Going To Mars Could Damage The Brains Of Astronauts