结果是，进化树的结构变得非常不稳定而且能转变。
As a result, the structure of that evolutionary tree is very unstable and can flip around.
甚至为直立行走增加平衡的前弯脊柱“在结构上不属于最理想的解决方式”，她说，因为它可导致身体不稳定，甚至椎骨骨折。
Even the basic forward curve that promotes balance in upright walking is “not a structurally ideal solution, ” she said, since it can lead to instability and even fractured vertebrae.
但全球化的好处并没有令所有的国家受益，其中所包含的结构性的不稳定也在信贷紧缩中暴露出来。
The benefits of that globalisation were not evenly shared around the world and the structural instabilities it contained were brutally exposed by the credit crunch.
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