Chemistry has traditionally been subdivided into four areas: organic, inorganic, analytical, and physical chemistry.

学被传统地为四个领域：有机学、无机学、学和物理学。

The study is in the journal Analytical Chemistry.

这项研究结果发表在《学》期刊上。

Their work appears in the journal Analytical Chemistry.

他们的研究结果发表在《学》期刊上。

But a new study shows that a background in math and analytical chemistry doesn't hurt.

一项新研究表明，对于煮咖啡来说，拥有数学和学背景并没有坏处。

Vadoud Niri, an analytical chemist at the State University of New York, Oswego.

瓦杜德·尼里是纽约州立大学奥斯威戈校的学师。

The roots of the periodic table can be traced back to the beginning of the 19th century, when the rapid development of analytical chemistry led to an explosion of new discoveries about elements and compounds.

元素周期表的起源可以追溯到 19 世纪初，当时学的快速发展使得有关元素和合物的新发现呈爆炸式增长。

Unfortunately, analyzing the exact risks of chemically contaminated water is difficult.

遗憾的是，学污染水的确切风险颇为困难。

These can burrow through earth, and could be used to analyse chemicals or find water.

它们可以钻入地下，可以用来学物质或寻找水。

If they do not it is time to recalibrate the machine or the chemists. The SRM might be exactly the product they make, or it may be a material that from an analytical. Chemistry perspective is a good enough proxy.

如果他们不这样做，就到了重新校准机器或学师的时候了。标准参考材料可能是他们制造的 exact 产品，也可能是从学角度来看足够接近的替代品。

And that was how you figured out what chemicals were in something, is you took a sample and you looked at the chemicals.

你就是通过取样然后学成来弄清楚某物中含有什么学物质的。