溜溜球效應
The yo-yo effect is when people gain weight again after working hard to lose it while dieting.
溜溜球效應是指人們在努力節食減重之後，體重又再回升。
effect(n.)效應、效果、作用、影響cause(n.)成因、原因cause and effect因果special effect特效sound effect音效butterfly effect蝴蝶效應take effect生效、實施affect(v.)影響diet(v.)節食(n.)飲食習慣
Some experts say this is likely due to people returning to regular ways of eating.
部分專家表示，這可能是因為人們恢復了以往的飲食習慣。
due to因為、由於
However, scientists at Swiss Federal Institute of Technology have found another possible cause: fat cells “remember” being overweight.
然而，瑞士聯邦理工學院的科學家們發現，可能還有另一個原因：脂肪細胞會「記得」曾經過重。
overweight(adj.)過重的underweight(adjj.)過輕的remember／forget／stop後面加不定詞或動名詞，有不同意思
This memory may make it hard for some people to maintain their body weight after weight loss.
這記憶可能會讓一些人難以保持減肥後的體重。
loss(n.)喪失、遺失lose(v.)使失去
The scientists found this out by comparing fat cells of people who had been extremely overweight and those who had never had weight issues.
科學家是透過比較曾經過度過重和從未有過體重問題的人的脂肪細胞，而發現這一點的。
compare(v.)比較comparison(n.)比較、對照without／beyond comparison無與倫比by comparison相比之下extremely(adv.)極度地、極端地
Tests with these different types of cells showed that the fat cells of those who were overweight grew faster than the others.
對這些不同類型的細胞進行的檢驗顯示，過重者的脂肪細胞生長速度比其他人快。
The researchers then ran a similar experiment using mice.
研究人員接著使用白老鼠進行類似的實驗。
run an experiment進行實驗
They found that mice that had been overweight gained weight faster than other mice when both were given high-fat diets.
他們發現，當兩隻白老鼠都攝取高脂肪飲食時，曾經過重的白老鼠比其他白老鼠的體重增加得更快。
This confirmed the other findings and made the scientists believe that similar memory in the mice’s brain cells also affected their ability to gain weight.
這證實了其他的發現，也讓科學家們相信，白老鼠大腦細胞中類似的記憶也影響了牠們增重的能力。
finding(n.)發現
The tests did not discover any way to change the cells’ memory though.
不過，實驗並沒有發現任何改變細胞記憶的方法。
erase(v.)抹去、消除eraser(n.)橡皮擦cellular(adj.)細胞的
Other experts say that these findings seem likely to be true.
其他專家表示，這些發現很可能是正確的。
With more research, many hope that this new information will help the millions of extremely overweight people living in the world to lose weight and maintain a healthy weight.
隨著更多研究的進行，許多人希望這些新的資訊能幫助全球數百萬名過度過重者成功減重，並維持健康體重。