As an analogy, before a law of gravitation could be formulated, it was necessary to have the concepts of 'acceleration' and 'weight,' and there had to be commonly accepted measures of these terms.

作为一个类比，就像在形成万有引力定律之前，必须有“加速度”和“重力”的概念，而且必须有对这些概念的广泛接受的度量方式。

youdao

He had no idea how to describe this experience by analogy, but he was happy for a second chance.

他不知道如何用类推的方法描述这次经历，但是他很高兴能有第二次机会。

youdao

Sigmund Freud had used an analogy which likened the ego to a rider and a horse;

佛洛依德曾将自我比喻称一个骑马人和一匹马；

youdao

About.com was founded by Scott Kurnit, who saw in the early internet an analogy to the spirit of cobblers and metalworkers had in the sixteen and seventeen hundreds.

FORBES: About.com - Flashback To When The Web Was Young

And, again, go back to my health care analogy -- we had an issue that had been something that scientists had talked about for quite some time, is through half of the process in getting the House to agree on a bill.

WHITEHOUSE: Press Briefing

Early 20th-century Russia does not offer an exact analogy to Saudi Arabia, Egypt and Pakistan today, but like those countries it had a regime which failed to move with the times and failed to deal conclusively with a long tradition of terrorism and revolutionary ferment.

ECONOMIST: New world ahead