As lava flows and spreads to form a shield volcano, the volcano's eventual height depends on the new mountain's ability to support its own weight.
随着熔岩流动和扩散从而形成盾状火山，这座火山的最终高度取决于这座新火山支撑自身重量的能力。
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When you work at a computer, the keyboard should be at elbow height, so your upper and lower arms form an Angle of 90 degrees or more and your forearms are supported by armrests.
The tower’s main form was a twin helix which spiraled up to 400 m/1312ft in height, where visitors would be transported around with the aid of various mechanical devices.