我们为什么会眨眼？我们为什么会眨眼？You blink (眨眼) your eyes to clean them. Blinking also keeps your eyes wet (湿润...) your eyes to clean them. Blinking also keeps your eyes wet (湿润的). Your eyes don’t feel good ……

Drinking water should be pure, clean, safe, and healthy. However, a recent study showed that many US citizens aren’t satisfied with the quality of their drinking water. ……

Drinking water should be pure, clean, safe, and healthy. However, a recent study showed that many US citizens aren’t satisfied with the quality of their drinking water. ……

breathtaking (惊险的). These workers are under the skywalk. They clean the glass. They wear safety helmets (安全帽). They have many ropes (绳子) to keep them safe. It is so dangerous! It takes two weeks ……

;s biggest pollution issues. Masks have been keeping us safe from the virus. But they are discarded (丢弃... been keeping us safe from the virus. But they are discarded (丢弃) on the street. The designers collected ……

to clean it up in the morning. And then he went back to his job, patrolling (巡逻) the corridor (走廊), keeping all of us safe. Since then, my attitude toward our houseparents has changed completely. Instead ……

are comfortable to wear. They’re also good for keeping you cool in the summer. Wear them loose with a belt around the waist. A denim shirt gives you a clean-cut look, and it is suitable for those who ……

to help them understand that keeping the environment clean is important to everyone, especially... wealth for the city, many of them are looked down upon by the natives here.Of course it's unfair ……

to get along well with them and make these animals good pets.From page 19 to 23, we introduce you... (恐怖的). But the young owners all find a way to get along well with them and make these animals good ……

in a trashcan. “The goal is not just to clean up the park, because the visitors are generally careful about keeping things clean,” said Nicolas de Villiers, president of Puy de Fou Park. “The initiative (新措 ……

horrifying (恐怖的).  But the young owners all find a way to get along well with them and make them... to get along well with them and make them good pets.A19 SNAKEA19 SNAKEA girl from Beijing finds ……

in a new drive to get citizens to keep their hands clean. The so-called CSI campaign – “clean, safe... Reuters.To get squeaky-clean hands, one must do more than stick them under a faucet. Citizens are advised ……

can see what you’re doing. Keeping that in mind will help you stay safe.Failing to updateNo matter... habits you have.Take a look at some of the worst tech habits and learn to break them. Forgetting ……

神奇的“生命吸管”THIS is a LifeStraw. It makes it safe to directly drink from water. It can filter out (过滤) 99% of the germs (细菌) in water. It was invented to help people in poor countries without clean ……

神奇的“生命吸管”。THIS is a LifeStraw. It makes it safe to directly drink from water. It can filter out (过滤) 99% of the germs (细菌) in water. It was invented to help people in poor countries without clean ……