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Linguigo · No. 33B2科学3 分钟AI 生成

The Antarctic Ozone Hole in 2026: Seventh Largest on Record

图片：14398 / Pixabay

本篇内容
  • – 读一篇关于“科学”的短文
  • – 学习 8 个单词
  • – 练习 一般过去时 (Past simple)

satellite, protect, measure, ozone, layer, chemical, recover, destroy

点一下不认识的单词。

The ozone hole over Antarctica in 2026 was the seventh largest in 48 years of monitoring. This hole is an area where the ozone layer is thinner than usual. The ozone layer is important because it protects life on Earth by absorbing harmful ultraviolet light from the sun.

Scientists have been watching the ozone hole since 1979. They use satellites to measure the amount of ozone in the atmosphere. The hole is not a real hole but a place where ozone levels drop below 220 Dobson Units. In 1994, the deepest hole was recorded with only 73 Dobson Units.

In 2026, cold weather and a strong polar vortex caused the ozone hole to grow large. However, it was not as deep as some other large holes in the past. The size of the hole changes every year because of changes in the weather in the stratosphere.

The ozone hole was caused by chemicals called chlorofluorocarbons, or CFCs. These chemicals were used in refrigerators and sprays before 1987. When CFCs reach the upper atmosphere, sunlight breaks them apart and releases chlorine, which destroys ozone.

Because of the damage caused by CFCs, countries agreed to stop using them in 1987 with the Montreal Protocol. Since then, the ozone layer has started to recover slowly. Scientists expect the ozone layer to return to its 1980 level in the 2070s.

事实来源：NASA，2026年11月9日 · 原文出处

难句解析

  1. 1

    The hole is not a real hole but a place where ozone levels drop below 220 Dobson Units.

    难点在于“not a real hole but a place where...”结构，意思是“不是一个真正的洞，而是……的地方”。整句：这个洞其实不是物理上的洞，而是臭氧浓度低于220多布森单位的区域。

  2. 2

    When CFCs reach the upper atmosphere, sunlight breaks them apart and releases chlorine, which destroys ozone.

    难点在于“which destroys ozone”是非限定性定语从句，指代前面的chlorine。意思是：当CFC到达高层大气，阳光把它分解并释放出氯，这些氯会破坏臭氧。

  3. 3

    Scientists expect the ozone layer to return to its 1980 level in the 2070s.

    难点在于“expect sb/sth to do”结构，意思是“预期某人/某物会做某事”。整句：科学家预计臭氧层将在2070年代恢复到1980年的水平。

本篇语法

一般过去时 (Past simple)

一般过去时表示过去某个时间发生并已经结束的事：I visited Beijing last year. 规则动词加 -ed：walk → walked；很多常用动词是不规则的：go → went, see → saw, have → had。否定和疑问用 did + 动词原形：I didn't see him. Did you call her?

verb-ed / irregular form · did / didn't + base verb

故事中的例句

  • The ozone hole over Antarctica in 2026 was the seventh largest in 48 years of monitoring.
  • In 1994, the deepest hole was recorded with only 73 Dobson Units.
  • The ozone hole was caused by chemicals called chlorofluorocarbons, or CFCs.

常见错误

说过去的事时动词不变（中文用“了”“昨天”表示时间）。

Yesterday I go to the park.

Yesterday I went to the park.

本篇单词

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5 道题，考考你对故事、单词和语法的理解。