棱皮龟通过将鳍状肢底部的血管排列成逆流交换系统来完成这一过程。
The leatherback accomplishes this by arranging the blood vessels in the base of its flipper into a countercurrent exchange system.
我们将要回顾的是，我们如何创造能量，变换系统通过是要能量。
We're going to be reviewing how we make power using power conversion systems.
然而，在信号源和测量仪器之间通过切换系统建立连接会也会增加测量不确定度。
However, adding a switching system to facilitate the connection between the signal source and the measuring instrument also adds measurement uncertainties.
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