1. Researchers have discovered a new dehydratase enzyme that plays a crucial role in the synthesis of fatty acids. (研究人员发现了一种新的脱水酶酶，它在脂肪酸合成中起着关键作用。)
2. The dehydratase activity in the plant leaves decreases under drought conditions as a defense mechanism. (在干旱条件下，植物叶片中的脱水酶活性降低，作为一种防御机制。)