所以，如果你需要用数学式子计算一个值，那就只有用表达式返回这个值，没有其他语法结构可用，因为否则就无法处理这个值。
And so while you needed expressions for math to work, there was no point in making anything else return a value, because there could not be anything waiting for it.
在表达了目标函数和约束条件的式子以后，建立了确定剪力墙最优数量的数学模型。
The mathematical model for determining the optimal quantity of shear wall is thus established since the objective function and constraint conditions are formulated.
先基于绝对时间坐标系下的软土次压缩计算修正式子，提出耦合软土流变项的新型指数曲线模型，并采用数学中最优化技术，根据前期沉降实测资料对模型中参数进行反演。
A new type of exponential curve model, coupled with rheological term for soft soils, is put forward based on the calculation formula of modified secondary compression under absolute time coordinates.
今天，我决定在数学考试上作弊，就在我的手心里写了些式子。
Today, I decided to cheat on my math test by writing a couple equations on my hand.
今天，我决定在数学考试上作弊，就在我的手心里写了些式子。
Today, I decided to cheat on my math test by writing a couple equations on my hand.
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