Now their commanders say their fighters have managed to link up with a second front to the south of Misrata, creating a defensive arc around the city's southwestern flank.

现在，他们的指挥官称，现在战士们已经成功地连接起米苏拉塔南面另一条前线，在东南翼形成坚固的防线。

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A satisfactory approximation to monochromatic light can be obtained with a filter placed in front of the arc.

在碳弧前面放一个滤光片就可以得到令人满意的近单色光。

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Understeer is when the front wheels are carving a larger arc than the rear wheels.

当前轮划出的圆弧比后轮划出的圆弧更大时，就是发生了转向不足。

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This negative is illuminated from the front by an arc lamp, and the light from this lamp passes through the transparent regions of the liquid-crystal layer to the middle layer.

ECONOMIST: Curtains for celluloid

The wheel wrenched out of my hand and we started over in a big arc, the right front wheel caught sideways in the clay.

WSJ: Hal Holbrook Remembers a Road Show Wreck | Traveler's Tale