2020年中考英語作文預(yù)測：全球變暖
Earth’s temperature begins with the Sun. Roughly 30 percent of incoming sunlight is reflected back into space by bright surfaces like clouds and ice. Of the remaining 70 percent, most is absorbed by the land and ocean, and the rest is absorbed by the atmosphere. The absorbed solar energy heats our planet.
地球的溫度開始太陽。大約百分之30的太陽光被反射回太空的光明面與云冰。在余下的百分之70，多數(shù)是由陸地和海洋吸收，其余的被大氣層吸收。吸收太陽能加熱我們的星球。
As the rocks, the air, and the seas warm, they radiate “heat” energy (thermal infrared radiation). From the surface, this energy travels into the atmosphere where much of it is absorbed by water vapor and long-lived greenhouse gases such as carbon dioxide and methane.
當(dāng)巖石，空氣，和溫暖的海洋，他們輻射熱能源(熱輻射)。從表面上看，這種能量進(jìn)入大氣層，大部分是由水蒸氣和長壽命的溫室氣體如二氧化碳和甲烷的吸收。
When they absorb the energy radiating from Earth’s surface, microscopic water or greenhouse gas molecules turn into tiny heaters— like the bricks in a fireplace, they radiate heat even after the fire goes out. They radiate in all directions. The energy that radiates back toward Earth heats both the lower atmosphere and the surface, enhancing the heating they get from direct sunlight.
當(dāng)他們吸收輻射能量從地球表面，微觀水或溫室氣體分子變成小加熱器-就像在壁爐的磚，他們散發(fā)熱量，即使在火熄滅。他們在所有方向輻射。能量輻射回地球加熱低層大氣和表面，增強(qiáng)他們從陽光直射加熱。
This absorption and radiation of heat by the atmosphere—the natural greenhouse effect—is beneficial for life on Earth. If there were no greenhouse effect, the Earth’s average surface temperature would be a very chilly -18°C (0°F) instead of the comfortable 15°C (59°F) that it is today.
這種吸收和輻射熱的氣氛自然溫室效應(yīng)有利于地球上的生命。如果沒有溫室效應(yīng)，地球表面的平均溫度將是一個(gè)非常寒冷的18°C(0°F)而不是舒適的15°C(59°F)，它是今天。