As a result, these black nails jutted almost invisibly from the blackboard and this teacher kept banging his hands on them while erasing the board.

由于钉子的颜色和黑板一样，都是黑色，即使突出来也不明显的。再加上，老师边擦黑板边把钉子往里按紧，这下就更加隐蔽了。

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Creating very freely with no sketches, she glues and nails objects together, paints them black, or more rarely white or gold, and places them in boxes.

她不用素描就能自由地创作，将物体粘在一起并钉牢，将它们涂成黑色，或更罕见地涂成白色或金色，然后将它们放在盒子中。

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Smaller black tapestry nails created shadow below his eyes and chin. Three rows of yellow nails framed the portrait.

在这幅镶嵌画中，斯特拉提将闪闪发亮的大头钉做成达芬奇流畅的灰色胡须，较小的黑色钉子用在人物眼睛和下巴下方制造出阴影状，3排黄色钉子为这幅肖像加上了外框。

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There was Jimmy Black, the tough-as-nails guard from the Bronx.

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If your nails are dirty (male or female) or you have black bits in your teeth, no one is going to take you seriously.

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Silva, a pony-tailed woman with nails painted emerald green, made a small bag of brown and black cloth squares to hold the monkey, which is still too young to walk.

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