| 1. | The vanes are made of structural angle iron .
叶轮可用角钢制成。
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| 2. | Sibyl vane tossed her head and laughed .
茜比尔范把头往后一仰，大笑起来。
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| 3. | This device operates similarly to the vane pump .
这种装置的运转情况与叶轮泵很相似。
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| 4. | Explain why the vanes rotate when they are illuminated .
试解释：叶片被照亮时为什么会旋转。
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| 5. | Do the vanes in the figure rotate clockwise or counterclockwise ?
图中叶片的旋转方向是顺时针的，还是反时针的？
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| 6. | Straightening vanes can be used where long straight ways are not possible .
在不可能安装较长的直管段情况下，可以来用导流叶片。
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| 7. | Straightening vanes are effective in reducing the upstream pipe-length requirement .
矫直的叶片对于减少上游直管的要求长度是有效的。
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| 8. | Erosive action is achieved at each contraction where a pair of opposing vanes are installed .
在每个收缩区段中相对地设置一对叶片，都起到了冲洗作用。
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| 9. | The two vanes are at right angles in plan, and each is either all shaded or all in sunlight .
上、下两块觇板在一平面图上相交成直角，每块觇板全是阴暗的，或全被阳光照射。
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| 10. | It was the vane on the roof turning round and this change in the wind was the signal for a disastrous rain .
这是房顶上的风标在转动，风向的这种变化，就是一场特大暴雨的信号。
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