The theory of binaries, in terms of differential equations, is treated for the first time in this book.

二进制的理论，就微分方程而言，第一次在这本书里被对待。

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Due to the differential neo-tectonic lift and fall at Late Pleistocene Epoch, Xijiang River changed its course for the first time in the Dry Gorge.

更新世晚期。由于新构造的差异升降，旱峡成为西江在这一带第一次改道的中期古河道。

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First, the partial differential equations are transformed into discrete space, discrete time nonlinear difference equations through characteristic method and finite difference approach.

首先，通过特征线法和有限差分法得到了时间离散和空间离散的非线性状态方程。

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Members expressed concern about the redefinition of the working day, excessive management control, lack of recognition for part-time doctors and the differential treatment for consultants in their first seven years of practice.

BBC: Doctor split threatens NHS contract