An appropriate front lean Angle increases the range of a centrifugal compressor, improves the flow and enhances the isentropic efficiency.

合适的前倾角有利于扩大压气机工作范围，能够改善流道内的流动，提高等熵效率。

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They buttressed up the old building as it began to lean at a dangerous angle.

他们加固这座旧建筑，因为它的倾斜度已开始有危险了。

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The female can sit up at a 90 degree angle, lean forward towards him (if their weight allows it) or lean backwards and place her hands on the floor for support.

此时，女生可以坐直或向前俯身或向后仰体，可以用手撑住地板。

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