分别建立了四条流域水土保持作用下的降水产流综合模型—黑箱模型。

With these proposed methods, comprehensive precipitation-runoff models respectively have been developed for the four catchments.

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相比之下，长期运行的对话能够在一系列明确定义的请求期间保持作用域中的变量。

In comparison, a long-running conversation holds variables in scope over a well-defined series of requests.

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当高角度缝的走向与最大水平主应力的方向一致时，后期水平应力对原生裂缝有保持作用；

When the high-angle fracture has the same direction with the maximum horizontal stress, the subsequent horizontal stress will preserve the primary fracture.

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That's another way of saying maintaining velocity if it's not acted upon by a force.

这就是不受外力作用时,速度保持不变的另一种说法

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It was supposed to maintain the convertibility of the currency into gold.

它的作用在于保持,货币与金子间的转换。

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The fact that you don't need a force for it to move forever at a given speed in a given direction, that's not obvious, because in daily life you don't see that.

对于物体不需要力的作用就能保持,确定的速度和方向持续运动这一事实,它并非显而易见,因为在日常生活中你看不到这种情况

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