But there are synthetic substances as well.

但也有合成物质。

It's a synthetic substance that happens to be the lightest solid known to man.

这是一种合成物质是人们所最轻固体。

Opioids are synthetic substances that act like heroin.

阿片类药物是作用类似于海洛因合成物质。

They make things that the cell needs, like proteins!

核糖体合成细胞需要物质，例如蛋白质！

Gistex's produce is mainly polyester fabric, a synthetic material that requires a lot of chemicals.

Gistex 产品主要是聚酯织物，一种需要大量化学物质合成材料。

The only obstacle to the creation of mega powerful weapons or fuel is the inability to synthesize antimatter in large volumes.

制造超级强大武或燃料唯一障碍是无法大量合成反物质。

According to Landua, the synthesis of one gram of antimatter with current technology would cost about 1,000 trillion dollars.

根据兰杜阿说法，用目前技术合成一克反物质将耗资约一千万亿美元。

In ophthalmology, a synthesized form of the same chemical can still be used to help dilate the pupils.

在眼科，这种化学物质合成物仍可以用来帮助扩大瞳孔。

A gelatin-like substance engineered in thelaboratory of the Massachusetts Institute of Technology shields those cells from the attack.

麻学院实验室合成这种胶状物质能保护细胞免受侵害。

However, paradichlorobenzene is also listed as a compound that's thought to be a human carcinogen, though there haven't been any major human studies.

然而，尽管目前还没有主流对人研究，但是二氯苯也同样被列为化学合成物质，它也被认为是人类致癌物。

A third line of research depends on the fact that serotonin is made from tryptophan, a substance the body cannot synthesise, and so must ingest from food.

第三个研究方向取决于血清素是由色氨酸制成事实，色氨酸是一种人体无法合成物质， 因此必须从食物中摄取。

That, along with it containing tyrosine, an amino acid that aids neurotransmitter production, may make it hard to get some rest if you have a bunch of protein before bed.

因为它含有酪氨酸，酪氨酸是一种帮助合成神经传递物质胺基酸。因此如果你在睡前食用蛋白质类食品，便可能造成睡眠困难。

They have also discovered that the shells of many organisms in the area are short of aragonite, a form of calcium carbonate that gives them strength, but whose formation acid discourages.

他们也发现，这里许多生物外壳缺少文石—一种让这些生物产生力量碳酸钙形式—但是，它们体内酸性形式阻碍了这种物质合成。

It's made from soda ash, which at the time, it came from the ashes of sodium-rich marine plants like seaweeds, or it was made synthetically by reacting table salt, also known as sodium chloride, with other chemicals and minerals.

它由苏打灰制成，当时纯碱来自海藻等富含钠海洋植物灰烬， 或者是通过食盐（也称为氯化钠） 与其他化学物质和矿物质反应合成制成。