To produce a sample proof: Lay the substrate out on a smooth flat surface.

要产生一个样本证明：躺着的基板，光洁平整的表面上。

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I hope this is proof enough for most people that Earth is not flat, or at least that it was not flat on May 19th, 2015 when the photo was taken.

我希望这张照片能向大多数人证明地球不是平的；至少地球在2015年5月19日拍照当天不是平的。

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Unique storage handle design for easy carriers can be stored in outdoor activities, a variety of foam material, leak-proof design, allowing no room flat on the water bottle!

独特的把手储藏式设计，方便携带者在户外活动时可以储藏各种泡料，防漏的设计，可以让水壶平放于任何空间！

youdao

Unlike the X10, the tangle-proof flat cabling isn't removeable and connects using both earcups, but the connections seem robust enough to handle a good bit of torture.

ENGADGET

In terms of build quality, Klipsch has thankfully gifted the units with slightly thicker, tangle-proof flat cabling, fixing two of our chief complaints with the past versions.

ENGADGET: Ears-on with Klipsch's latest intra-aural headphone lineup: Image S4 (II) series, X7i

After a final proof, each flat had to be initialed by me and the production manager before it went in the transport box, which was carried away by the courier, a Vietnam vet with a logo-festooned jacket and handlebar mustache.

FORBES: My Best Job Ever