Carboxylic acids are in the mix, too, adding notes of cheese.

也混在其中增士味道。

After that happens, the liver turns the fatty acids into ketone bodies, like acetoacetic acid and beta hydroxybutyric acid; acetoacetic acid is a ketoacid because it has a ketone group and a carboxylic acid group.

此后，肝把脂肪转化成酮体，比如乙酰乙、β-羟基丁；乙酰乙是一种酮，因为它有酮基团和基团。

Some have suggested that these chemicals, including carboxylic acids, may have arrived on Earth from space, traveling via comets and meteorites to the forming planet.

一些人认为，包括在内这些化学物质可能是从太空中通过彗星和陨石到达球。

Also, mosquitoes are most attracted to a kind of chemical called carboxylic acid, which is usually produced by bacteria on human skin.

此外，蚊子最容易被一种名为化学物质吸引，这种化学物质通常由人类皮肤上细菌产生。

Now the study found that 50 molecular compounds were higher in mosquito magnets especially carboxylic acid on the skin.

现研究发现，招蚊子喜爱人群中有50种分子化合物更多，尤其是皮肤上。

Carboxylic acids are a type of organic compound characterized by a carbon (C) atom doubly bonded to an oxygen (O) atom and singly bonded to a hydroxyl group (-OH) .

是一种有机化合物，其特征是一个碳（C）原子与一个氧（O）原子双键结合，并与一个羟基（-OH）单键结合。

Numbering the other way, 1-2-3-4, the carboxylic acid is on carbon 1 (that's pretty ideal).

以另一种方式编号， 1-2-3-4， 在碳 1 上（这非常理想）。

And carboxylic acids are notorious for being weak acids.

因其弱而臭名昭著。

While carboxylic acids are ketones bonded to an OH group instead of an R group, and ethers are just alcohols bonded to an R-group instead of a hydrogen.

虽然是酮与一个羟基（OH）相连而不是与R基团相连，而醚则是醇与一个R基团相连而不是与氢原子相连。

If it's a six carbon chain with a carboxylic acid on it and an alcohol on one of the other carbons, our name has to do two things: identify that the hydroxyl group is there and identify where it is.

如果它是一个六碳链， 上面有一个， 另一个碳上有一个醇，我们名字必须做两件事：确定羟基存在并确定它位置。

Acetone has a ketone group and it's called 'acetone' because it was derived from acetic acid, which is vinegar, the most common carboxylic acid in your kitchen.

丙酮具有一个酮基，它被称为“丙酮”是因为它是从醋中衍生出来，而醋就是厨房中最常见，也就是食醋。

It's also got the carboxylic acid though, so let's go ahead and call it butenoic acid.

不过它也含有， 所以让我们继续称之为丁烯。

The most weighted of all is the carboxylic acid functional group, so no matter what else is on a six carbon chain, if there's a carboxylic acid, then it's a hexanoic acid.

最重要是官能团，所以无论六碳链上还有什么， 如果有， 那么它就是己。