【英语时差8,16】食物是如何消化的？2

 At night when there’s no food in your stomach, the protease is deactivated¹ so it stops working. Unfortunately, disease, alcohol, and some drugs can override² the enzyme³ that is supposed to be controlling the protease. When that happens, the protease begins to digest the stomach wall and ulcers⁴ develop. So, in a healthy person, the body builds its digestive enzymes⁵ with what amounts to an on/off switch and then builds a second enzyme especially designed to operate the switch. The digestive system also protects itself by being one of the fast growing tissues in the body, constantly discarding old cells and reproducing new ones. So some of it does get digested, but there’s always more to take its place.

1 deactivated   

v.解除动员( deactivate的过去式和过去分词 )；使无效；复员；使不活动

参考例句：

• \"The brain can be deactivated. It can be yours to command.\" “大脑计算机可以被停止。如果你下达命令的话。” 来自互联网
• He successfully deactivated a nuclear reactor in a laboratory before meltdown. 他成功停用一个核反应堆在实验室之前崩溃。 来自互联网

2 override   

vt.不顾，不理睬，否决；压倒，优先于

参考例句：

• The welfare of a child should always override the wishes of its parents.孩子的幸福安康应该永远比父母的愿望来得更重要。
• I'm applying in advance for the authority to override him.我提前申请当局对他进行否决。

3 enzyme   

n.酵素，酶

参考例句：

• Above a certain temperature,the enzyme molecule will become unfolded.超过一定温度，酶分子将会展开。
• An enzyme that dissolves the fibrin of blood clots.能溶解血凝块中的纤维的酶。

4 ulcers   

n.溃疡( ulcer的名词复数 )；腐烂物；道德败坏；腐败

参考例句：

• Detachment of the dead cells produces erosions and ulcers. 死亡细胞的脱落，产生糜烂和溃疡。 来自辞典例句
• 75% of postbulbar ulcers occur proximal to the duodenal papilla. 75％的球后溃疡发生在十二指肠乳头近侧。 来自辞典例句

5 enzymes   

n. 酶，酵素

参考例句：

• It was said that washing powders containing enzymes remove stains more efficiently. 据说加酶洗衣粉除污更有效。
• Among the enzymes which are particularly effective are pepsin, papain. 在酶当中特别有效的是胃朊酶、木瓜酶。