你们可能会想起小学时，将一些加法表达式，放在圆括号里，这样加法可以先计算，然后是乘法，否则，乘法默认先发生。
You might recall from grade school sometimes you put things in parentheses so that your addition happens first, then your multiplication, otherwise multiplication would happen by default first.
再按两次回车将显示加法和减法表达式。
Pressing return a couple more times will show an addition and subtraction.
建立了散射边界条件，并运用柱函数的加法定理，通过理论推导得到了聚焦区内刚性球形微粒的散射声压表达式。
After the scattering boundary conditions were set up, the scattering pressure expression of the solid sphere in the focusing area was derived by column function addition theorem.
通常比加法或乘法具有更高优先级的求幂在此示例中最后计算，因为其他表达式都放在括号中。
Exponentiation, which normally has higher precedence than addition or multiplication, is evaluated last in this example because the other expressions are enclosed in parentheses.
在这个表达式中，加法运算的结果被保存到与units_sold相关联的存储单元中，而units_sold之前的值则被覆盖。
In this expression, the result of the addition is stored in the storage associated with units_sold; the previous value in units_sold is overwritten.
应用勒让德多项式的加法定理和类似于求傅里叶系数的方法，导出了新展式中系数的普遍表达式。
The method, which we use to derive the general expressions for the new coefficients in the development of gravity anomaly Ag(m, a), is analogous to Fourier's.
利用振型迭加法导出了结构物理参数和作用荷载幅值同时具有随机性时结构动力响应随机变量的数字特征计算表达式，并提出了求解方法。
The randomness of both physical parameters of structure and the amplitude peak of applied load are taken into account in the present model.
利用振型迭加法导出了结构物理参数和作用荷载幅值同时具有随机性时结构动力响应随机变量的数字特征计算表达式，并提出了求解方法。
The randomness of both physical parameters of structure and the amplitude peak of applied load are taken into account in the present model.
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