No animals except humans have ever been known to draw unaided a picture of their environment, although some chimpanzees, given human encouragement and materials, have produced abstract paintings.

除了人类，任何动物在没有帮助的情况下都无法画出他们周围环境的图像，尽管人类的鼓励下和并给予材料，一些猩猩能画出抽象画。

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Inspection technology allows more than 100 million measurements a second to be made across the ribbon, locating flaws the unaided eye would be unable to see.

检测技术可以在一秒钟内对玻璃带进行超过1亿次的测量，从而定位肉眼无法看到的瑕疵。

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He tore free from them, ducked through the ropes unaided, and leaped heavily to the floor, following on their heels as they forced a passage for him down the crowded centre aisle.

他挣脱他们的手，自个儿低头钻过绳子，沉重地跳到地板上，跟在替他从拥塞的中央过道挤出一条路的助手们后面。

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Sometimes,observers see this as a comet's tail, which can be visible to the unaided eye stretching across the night sky.

VOA: special.2011.02.09

The Andromeda Galaxy is big enough and near enough to be seen by the unaided eye in the star group Andromeda on a dark night.

VOA: special.2009.01.20

However, they do not have the power to overhaul unaided a legal institution which, like much of Britain's constitutional machinery, has evolved over generations and now seems dangerously ramshackle.

ECONOMIST: The law: Judging the judges | The

It is that as a mathematician he discovered - alone and unaided - the binomial theory usually attributed to a famous English scholar called Isaac Newton.

BBC: Part Three - France and the World

When she could no longer walk unaided, instead of using a cane, she used a broom, so it might just look like she was sweeping.

FORBES: My Aunt, Olive June Black, An Ohio Original -- In Memoriam