We can do that by either measuring the reactants or the products.

我们可以通过测量应物或生成物来实现这一点。

And just like with other chemical reactions we've talked about, we need to know more about a nuclear reaction than just what's reacting and what's being produced.

正如我们之前讨论过其他化应一样，我们需要了解核应信息，而不仅仅是应物和生成物。

Think of like an imaginary reaction A plus B yields C plus D. The lower case letters represent the coefficients of the reactants and products.

一个应 A 加上 B 生成 C 加上 D。小写字母代表应物和生成物系数。

Hemoglobin is a product of red blood cells.

【product】血红蛋白是红细胞生成物。

If you provide more of the products over here, then you're gonna go in that direction.

如果你提供生成物到这里，应就会朝那个方向进行。

Notice that only the reactants are used for this not the products.

注意这里只使用了应物，而不是生成物。

So we have an arrow that moves us to the product, or we could say the products.

所以我们有一个箭头指向生成物，或者我们可以称之为生成物。

And then we have an arrow that moves us to the product.

然后我们有一个箭头将我们导向生成物。

The capital letters stand for the reactants and the products and the lowercase letters stand for their coefficients.

大写字母代表应物和生成物，小写字母代表它们系数。

Reconciling the reactants with the products is called equation balancing, and it's a good bit of what stoichiometry is all about.

将应物与生成物配平称为方程式配平，这是化计量重要内容。

But in a lab, or in life, you have to work with measurable amounts of stuff, so the last stoichiometric trick you need up your sleeve is to calculate specific masses of the reactants and products.

但在实验室里， 或者在生活中，你需要处理可测量物质数量，所以你需要掌握最后一个化计量技巧就是计算应物和生成物具体质量。