One should never judge a person by mere external appearances because appearances are deceptive.

永远不要只通过外表来评判一个人，因为外表具有欺骗性。

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A combination of internal and external factors caused the company to close down.

内外因结合导致了公司的倒闭。

《牛津词典》

We deal with the external factors that impact a person's situation and outlook.

我们处理影响一个人的处境和前景的外部因素。

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"The brain-machine interface is a system that allows disabled people, people suffering from physical disabilities to communicate with external world and also to control devices."

VOA: special.2011.04.04

And those campuses, that Interfaith Council had a set of internal interfaith discussions and also did a set of external programs like Days of Interfaith Youth Service.

那些大学，跨信仰委员会,拥有一系列内部的跨信仰讨论,还举办一系列外部的项目，例如,跨信仰青年服务日。

普林斯顿公开课 - 人性课程节选

We have a weight on the piston, and that weight is chosen so that p2 it acts as though p external is equal to p2.

让活塞上放一重物，让它的效果刚好,等同于外压强。

麻省理工公开课 - 热力学与动力学课程节选

Arithmetically, higher government saving and a bigger external deficit imply a further fall in private net saving.

ECONOMIST: Living on borrowed time

As a member of the West African Economic and Monetary Union, Senegal is working toward greater regional integration with a unified external tariff and a more stable monetary policy.

FORBES: Senegal

Spector, a reconstructive surgeon, is focusing on children born without a fully developed external ear, a condition called microtia.

WSJ: Scientists use 3-D printing to help grow an ear