The relaxation iterative method for solving branch river networks is extended, which can turn the problem of any complex river networks into the problem of a series of single rivers.

将支流流量的松弛迭代方法从树状河系推广到了环状河网，使任意复杂河网水力计算的问题都可化为一系列的单一河道的水力计算问题；

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We do not know what ingredients of tea were responsible for these effects on stress recovery and relaxation. Tea is chemically very complex, with many different ingredients.

我们确实不知道是茶中的何种成分起到了抗压力促进放松的作用。茶的化学成分非常复杂，含有许多不同的成分。

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Complex plane analysis for the dielectric relaxation of 1, 2-polybutadienes was performed.

本文对1,2 -聚丁二烯的介电松弛进行了复平面分析。

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The thick blast doors on the entrance to the Inverurie complex were permanently fixed in an open position in 1992, a clear sign at the time of the relaxation in tensions between the East and West.

BBC: Bunker mentality: The Cold War bunkers still in use