he ozone layer depletion is harmful to the environment. The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of t...
Renewable energy is energy that is environment-friendly because it is collected from renewable resources, which are naturally replenished. Examples of...
你知道吗？你经常用的智能机能源消耗比你家里的冰箱还要多。What do you think are the biggest energy users in your home? Your list most likely includes your A.C., fridge, washing mac...
Everybody knows these four tastes: sweet, sour, bitter, and salty. But did you know there was a fifth one? Well, don’t feel too bad; it wasn&rsq...
The cherry-tree is a small tree which grows to a height of about twenty feet. Its stem is covered with a smooth brown bark, and its green leaves have ...
All through the summer, and during spring and autumn as well, our meadows and waste places are thickly dotted with the bright-yellow flowers of the co...
Have you ever seen a hive of bees? Some hives are made with glass sides, through which we can see all that the bees are doing.你有没有看到过蜂箱? 有些蜂箱的侧面是玻璃的, ...
孤独不利健康——绝对和肥胖一样糟糕，可能也和吸烟一样有害。因此，在疫情肆虐的日子里，在许多地方，人们被迫独处，如何阻止独处转化为孤独是一个紧迫的医学问题。Loneliness is bad for your health—certainly as bad as b...
You may have heard the name "Michelin" because it's related to Michelin tires.你或许听过米其林”这个名字，因为它和米其林轮胎有关。See, in the year 1900, the...
研究人员已经知道，全球各地的女性寿命都比男性长。科学家们认为，男女预期寿命差异很大程度上与生物学上的生存因素有关。Researchers already know that women live longer than men in all parts of the world. Scientist...