One report tells of a totally blind boy who could ride his tricycle at good speed round the block near his home, using facial vision.

有一则报道讲述了一个完全失明的男孩，可以用面部视觉围绕他家附近的楼栋快速骑三轮车。

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Defensive weapons: Dwarves armed with shields receive additional armor and can sometimes block attacks completely, but their speed is also slightly reduced.

防御武器：矮人手持盾牌获得额外的装甲和有时可以完全阻断攻击，但他们的速度也略有减少。

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Features: small volume, light, easy to use, broad filtering area, low block rate, high filtering speed, no pollution, good heat stability and chemical stability.

其特点是体积小、重量轻、使用方便、过滤面积大、堵塞率低、过滤速度快、无污染、热稳定性及化学稳定性好。

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"They came up on us so fast that I could see Carl trying to block and he finally said there's no real way to block the speed that they're bringing, " Johnson said.

NPR: David Ragan Steals Last-Lap Victory At Talladega

For example, it has been shown how polar glaciers speed up when the floating ice shelves that block their way to the ocean are removed.

BBC: Under-ice flood speeds up glacier

In trucks equipped with the eight-speed transmission, the Ram can activate its (optional) aero-shutters, which block off portions of the grille to reduce aerodynamic drag.

WSJ: 2013 Ram Laramie Longhorn Review: A Truck That Jingle Jangle Jingles