Sea urchins are perhaps best known for their armor of spines. But their mouths may be even more daunting-urchin teeth can literally chew through stone without getting dull.
也许关于海胆，人们知道得最多的是它们的棘刺盔甲。但是，它们的口器可能更令人望而生畏——毫不夸张地说，海胆的牙齿可以把岩石咬碎，却永远不会变钝。
The modelers came up with tricks designed to increase flexibility, like the use of nested metal cups for characters' necks and spines to allow a wider range of motion without "bending" the metal.
塑型员们带来了一些绝妙的设计，以增加他们的灵活性，比如运用金属嵌杯充当人物的颈部，并让它稍微有一些隆起，这样，不需要“弯曲”金属，就可以让它有一个更大的运动的空间。
In bouldering ankles and spines are top casualties. Without a good spotter to catch your fall you will get hurt some day.
抱石的时候踝关节和脊椎是最容易受伤的地方，如果没有人(spotter)给你做保护，总有一天你会受伤的。
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