十万个为什么·科学阅读30篇（6）
21 / 30
正在确认阅读权限…
Why Do Deserts Get So Hot During the Day?
为什么沙漠白天会变得非常热？
-
Deserts have very little water or plant cover on the ground.沙漠地表缺水，植被稀少。
-
Sunlight heats dry sand quickly and strongly.阳光迅速而强烈地加热干燥的沙子。
-
Sand cannot hold moisture to cool the air.沙子无法保持水分来冷却空气。
-
There are few clouds to block the sun’s rays.云层稀少，难以遮挡阳光。
-
Heat builds up fast with no shade or breeze.没有树荫和微风，热量迅速积聚。
-
Temperatures often rise above 40°C in daytime.白天气温常升至40°C以上。
-
At night, deserts cool down quickly too.夜晚沙漠也迅速降温。
-
This big day-night difference is normal for deserts.昼夜温差大是沙漠的常态。