Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago.

科学家们已经确定，在埃塞俄比亚阿法尔地区干燥河床的细颗粒沉积物中发现的具有锋利边缘的石片存在于252万至260万年前。

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They say she was like a blade herself, as sharp and keen-edged and quick, as if she were made of steel and lightning.

人们说，她就像是一把剑，锋利无比，疾如闪电，似乎她本来就是由钢和闪电铸成的。

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These colorful, sharp-edged little punks arrive in a series of pre-perforated sheets for you to construct your own, making you a part of the creative process.

这些色彩缤纷、边缘清晰的小朋克是以一系列冲孔薄金属板的形式到你手中的，你可以自己组装，使你自己也参与创作过程的一部分。

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In "Stonewall, " Hamman takes his sharp-edged croon for a lumbering, jazzy stroll.

NPR: Run On Sentence: A Lumbering Stroll

One, a sharp-edged Milanese businesswoman in her mid-40s, was evidently struck by the charms of the man in the adjacent seat, a cool-looking dude of a similar age dressed in beige linen, with the teak tan of the year-round jetsetter.

FORBES: Tall, Dark And Handsome (With Tendency To Hog The Armrest): Should We Welcome Pre-flight Social Networking?

He said it was "very rare" that a plant-eater would sport sharp-edged, enlarged canines.

BBC: Dwarf 'vampire' dinosaur was a plant eater