When energy is needed - all three monosaccharides are metabolized through glycolysis, then the citric acid cycle, and oxidative phosphorylation.

当机体需要能量时，三种单糖就会通过糖酵解、三羧酸循环、氧化磷酸化进行能量代谢。

The citric acid gets put into the citric acid cycle, also known as the TCA cycle, or the Krebs cycle... or just as that thing everybody hates memorizing for bio class.

柠檬酸进入柠檬酸循环，也称为 TCA 循环，或克雷布斯循环… … 就像生物课上每个人都讨厌记忆的东西一样。