By the alcohols and diacids or W - hydroxy acid synthesis of polyester line criminal macromolecules.

由元醇与二元酸或W - 羟基酸等合成的聚脂线刑大分子构成.

互联网

Lactic acid A 3 - carbon hydroxy - acid formed as a result of fermentation by cretain bacteria, e . g . Lactobacillus.

乳酸:某些细菌发酵得到一种三碳羟基酸. 例如:乳酸菌.

互联网