时差N小时 肚子饿时响起的咕咕声

If you're too busy to remember to eat, your stomach will remind you it's time to refuel by growling². We'll look at what happens in your gastrointestinal tract⁴, or GI tract, when you're hungry and when you're full.

如果你太忙了而忘记了吃饭，你的胃会咕咕叫着提醒你去吃饭。让我们来看看当你饥肠辘辘或者饱餐一顿时，在你的消化道里发生了什么？

Your GI tract is an involuntary muscle which is constantly contracting and expanding. After you've eaten, your gastrointestinal muscle contracts and relaxes in order to move food from your stomach into the intestines⁵. When the GI tract has finished digesting a meal, it continues to process the liquids and gasses remaining in the intestines. This process often causes your stomach to rumble⁶ when you're hungry.

你的消化道是一组非随意肌，它会不停的收缩扩张。吃饭后，你的胃肠肌会收缩与放松，这样就能将食物从胃部移入肠道。当消化道消化完食物后，会继续处理残留在肠道的液体和气体。这个过程经常使你在饥饿时胃部咕咕作响。

Stomach growling is caused by intestinal³ contractions⁷ squeezing and popping intestinal gasses. Actually, stomach rumbles⁸ are simply flatulence that stays inside the body. The same contractions that cause your stomach to growl¹ also clean out the GI tract. To see how this cleaning movement works, picture a long hose made of a pliable⁹ material. If there were an object, say an egg, at the end of the hose, you could push it from that end to the other by squeezing all along the length of the hose. This is how the GI tract keeps itself clean.

肠道挤压在它里面的气体使得胃里产生咕咕的低鸣声。实际上，肚子咕咕叫就是体内的肠胃气胀。这种收缩虽然会让肚子咕咕叫，但也会帮助清理消化道。想要了解这个清理运动是如何进行的，就试着幻想一条柔韧型材料做成的长软管。如果软管的末端有一个物体，比如说一个鸡蛋，你可以通过不断挤压软管把鸡蛋推向另一端。这就是消化道如何自我清理的过程。

In order to push out bits of food particles left over from a meal, your gastrointestinal tract creates waves of contractions all along the length of the intestines at a rate of two or three per minute. All of this activity in your GI tract when you're hungry can be very noisy, as anyone who has been in the middle of a pre-lunch meeting when stomachs started rumbling¹⁰ can tell you.

为了排出餐后少数的食物残渣，你的消化道每2至3分钟就会产生一个沿着肠道传播的收缩运动。当你感到饥饿的时候，消化道里所有的活动都会显得聒噪。在午餐前开会时肚子突然咕咕作响的员工会告诉你这有多么尴尬。

1 growl   

v.（狗等）嗥叫，（炮等）轰鸣；n.嗥叫，轰鸣

参考例句：

• The dog was biting,growling and wagging its tail.那条狗在一边撕咬一边低声吼叫，尾巴也跟着摇摆。
• The car growls along rutted streets.汽车在车辙纵横的街上一路轰鸣。

2 growling   

n.吠声, 咆哮声 v.怒吠, 咆哮, 吼

参考例句：

• We heard thunder growling in the distance. 我们听见远处有隆隆雷声。
• The lay about the deck growling together in talk. 他们在甲板上到处游荡，聚集在一起发牢骚。

3 intestinal   

adj.肠的；肠壁；肠道细菌

参考例句：

• A few other conditions are in high intestinal obstruction. 其它少数情况是高位肠梗阻。 来自辞典例句
• This complication has occasionally occurred following the use of intestinal antiseptics. 这种并发症偶而发生在使用肠道抗菌剂上。 来自辞典例句

4 tract   

n.传单，小册子，大片(土地或森林)

参考例句：

• He owns a large tract of forest.他拥有一大片森林。
• He wrote a tract on this subject.他曾对此写了一篇短文。

5 intestines   

n.肠( intestine的名词复数 )

参考例句：

• Perhaps the most serious problems occur in the stomach and intestines. 最严重的问题或许出现在胃和肠里。 来自辞典例句
• The traps of carnivorous plants function a little like the stomachs and small intestines of animals. 食肉植物的捕蝇器起着动物的胃和小肠的作用。 来自辞典例句

6 rumble   

n.隆隆声；吵嚷；v.隆隆响；低沉地说

参考例句：

• I hear the rumble of thunder in the distance.我听到远处雷声隆隆。
• We could tell from the rumble of the thunder that rain was coming.我们根据雷的轰隆声可断定，天要下雨了。

7 contractions   

n.收缩( contraction的名词复数 )；缩减；缩略词；（分娩时）子宫收缩

参考例句：

• Contractions are much more common in speech than in writing. 缩略词在口语里比在书写中常见得多。 来自《简明英汉词典》
• Muscle contractions are powered by the chemical adenosine triphosphate(ATP ). 肌肉收缩是由化学物质三磷酸腺苷(ATP)提供动力的。 来自辞典例句

8 rumbles   

隆隆声，辘辘声( rumble的名词复数 )

参考例句：

• If I hear any rumbles I'll let you know. 我要是听到什么风声就告诉你。
• Three blocks away train rumbles by. 三个街区以外，火车隆隆驶过。

9 pliable   

adj.易受影响的；易弯的；柔顺的，易驾驭的

参考例句：

• Willow twigs are pliable.柳条很软。
• The finely twined baskets are made with young,pliable spruce roots.这些编织精美的篮子是用柔韧的云杉嫩树根编成的。

10 rumbling   

n. 隆隆声, 辘辘声 adj. 隆隆响的 动词rumble的现在分词

参考例句：

• The earthquake began with a deep [low] rumbling sound. 地震开始时发出低沉的隆隆声。
• The crane made rumbling sound. 吊车发出隆隆的响声。