201607081657《中英對照讀新聞》New fridge laser helps you eat right 新型雷射冰箱讓你吃對食物
How many times have you skipped work due to food poisoning? And throughout the day, you keep wondering, "Was it the burger from McDonald’s or was it KFC’s bucket chicken?" The real culprit was the week-old sausage from your fridge.
Now, we could put an end to this dietary problem since researchers from Korea Advanced Institute of Science and Technology have found a quick-fix way to spot bacteria on the surface of refrigerated foods in just a few seconds.
The laser technique is quite simple. Bacteria such as salmonella have hair-like flagella that they use to propel themselves across surfaces. This movement turns the surface of contaminated food into an ocean of writhing microorganisms. When a red, coherent laser beam hits contaminated food, it is scattered through the material, creating a random pattern called laser speckle.
All that is needed is a camera that can record the change over a few seconds.
The equipment is not expensive. It can be easily installed in your home refrigerators. And the new technique can significantly improve food hygiene and thereby reduce the number of cases of food poisoning each year.
Culprit：名詞，罪犯；元兇。例句：The culprit of this car accident is not alcohol or drugs but fatigue. （這起車禍的肇因不是酒精或毒品，而是疲勞所致。）
Refrigerated：形容詞，冷凍的。例句：The supermarket is famous for its great variety of refrigerated foods. （這家超市以豐富多樣的冷凍食品遠近馳名。）
Subtract：動詞，減去。例句：If you subtract five from eight, you get three. （8減掉5等於3。）