A carat is a weight measurement used only with some valuable minerals.

克拉一种只用于测量某些贵重矿物重量的计量单。

A scale does measure weight, the force gravity puts on a mass, but the numbers on the scale, in kilograms or pounds, are not measures of weight.

体重计的确测量体重，也就地球对你的重力，体重计上的单，例如磅和公斤，并不" 重量" 的单。

This is easily and rapidly discharged, so capacitors have good power density (the rate at which they transfer energy, per unit of weight).

比较容易，也比较快速，所以电容器有着良好的功率密度（每单重量的能量传递速率）。

That's right, long before it was preceding trending topics on Twitter, this was known as the pound sign.

没错，远在它成为 Twitter 上标记热门话题的号之前，它的身份其实 “磅号”，用来表示重量单 “磅”。

Except it's now written you a seven step method with full weights and measures for a recipe.

不过现在它给你写了一个七步烹饪法，包括食谱的全部重量和单。

But chemicals can hold a lot of energy, so batteries have high energy density (the amount of energy they can contain, again per unit weight).

化学物质可以储存很多能量，所以电池有很高的能量密度（每单重量可以包含的能量）。

Literally, a ton is a unit of measurement for weight.

字面上，“吨”一个用于衡量重量的单。

Really makes you appreciate standard weights and measurements doesn't it.

真的让你 appreciation 标准的重量和测量单，不吗。 注：此处的 " appreciate" 保持不变因为在中文里直接翻译为“欣赏”或“感激”可能不合上下文的情感表达，所以保留了原文中的英文单词以保持原意。不过，更自然的表达可以：“这真的让你意识到标准重量和测量单的重要性，不吗。”

I mean, it's the highest density source of calories among the macronutrients.

我说，它宏量营养素中每单重量热量含量最高的来源。

The shilling, too, seems originally to have been the denomination of a weight.

先令最初似乎也重量的单。

And by the way, you say 57, that refers to weight divisions and that's in kilograms and kilograms is the measure of weight that the rest of the world uses and the United States does not.

顺便说一下，你说的57指的体重级别，这以千克为单的，而千克世界上其他国家使用的重量单，美国不使用这个单。

When the National Assembly, or the Estates General, met in 1789, in the lead-up to the revolution, a demand to standardize weights and measures was high on the agenda.

当国民议会或三级会议在1789年召开，革命即将来临之际，统一重量和测量单的需求被提上了议程。

So most of the carbon you'll find-- if you just found carbon someplace, on average its weight in atomic mass units is going to be 12.0107.

所以你找到的大部分碳——如果你在某个地方找到了碳，平均来说它的原子质量单重量将12.0107。

" Each serving size, " Wendy says, " has 30 grams of fat." A " gram" is a unit of measurement for weight.

“每份量，”Wendy说，“含有30克脂肪”。一“克”重量的计量单。

In the Metric System: milligram: A milligram is a very small unit of weight in the Metric System.

在公制系统中：毫克：毫克公制系统中一个非常小的重量单。

That's right! We measure weight in Newtons, in honor of Sir Isaac, and NOT kilograms!

这对的！我们以牛顿为单测量重量， 为了纪念艾萨克先生，不公斤！

Now you'll notice that because people didn't usually carry around a standard set of weights they used coins as both the unit of worth and the unit of weight.

现在你会注意到，因为人们通常不随身携带一套标准砝码，他们就使用硬币作为价值单和重量单。