如果在飞行中它们失去了能量，它们可以自旋下降并着陆而无需承受任何伤害，因为它们弹性构造可以使伤害转向。

If they lose power while flying, they can autorotate down and land without sustaining any damage due to their flexible structure that deflects upon impact.

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介绍了体外预应力桥梁结构的构造细节，包括转向块、锚块、预应力束等。

This paper introduces the external prestressed bridge structure in details, including steering block, anchor block, and prestressing tendon, etc.

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对一类具有转向性质的简单分支点，从方程本身出发，根据奇点的性质，构造出确定奇点位置的直接方法。

According to the property of the singular points, we construct a direct methods for Determining the positions of a class of turning simple bifurcation points.

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