Nacreous clouds ? also known as polar stratospheric clouds ? contribute to the formation of the polar ozone holes 珍珠云，也称为极地平流云，会造南极臭氧空洞的形成。
Prof austin ' s computer simulation suggests that the arctic ozone hole will not recover until around 2040 奥斯丁教授的电脑模拟显示北极的臭氧洞到2040年之前也不会复原。
Old refrigerators , cars and fire extinguishers are preventing the ozone hole over the antarctic from closing as quickly as scientists originally estimated 旧冰箱、旧车和灭火器必科学家原本预测更快速地正在阻止南极臭氧洞的愈合。
If the circumpolar vortex lasts longer than usual in future years , a large ozone hole could be expected to develop above the arctic 如果环极涡旋在未来几年里比正常情况下持续更长时间，一个大规模的臭氧空洞就很可能在北极上空发展起来。
Niwa scientist stephen wood cautiously said , " we need to see smaller or less severe ozone holes over a number of years before we can say for certain that the ozone layer is recovering . Niwa的一位科学家史蒂芬伍德谨慎地表示：我们还需要几年的时间，持续观察臭氧层的洞真的缩小或是较不严重了，才能肯定地说，臭氧层确实已在修复当中。
A reversal could knock out power grids , hurt astronauts and satellites , widen atmospheric ozone holes , send polar auroras flashing to the equator and confuse birds , fish and migratory animals that rely on the steadiness of the magnetic field as a navigation aid 逆转会破坏能量网格，损害宇航员和卫星，加大臭氧层空洞，发送极光到赤道而搞乱鸟类，鱼和迁徙动物，它们依靠磁场的稳定性作为导航帮助。
Along with high - speed development are such disturbing phenomena as environmental pollution , soil erosion , elnino , ozone hole , increasing sea level and global warming , which have accompanied human beings through the 20th century , and now into the 21st century as thorny problems for the new century 作为高速发展的伴生物：环境污染、水土流失、厄尔尼诺、臭氧层空洞、海平面升高及全球气候变暖等令人不安的现象,伴随着人类走过了20世纪，又伴随着人类跨入了21世纪，成为新世纪的难题。
In february 1992 , nasa scientists announced that levels of chlorine monoxide resulting from the breakdown of cfc ' s were at record levels above the northern hemisphere near the arctic and that these conditions could cause an ozone hole to develop over much of europe , canada , russia , and northern portions of the united states by the year 2000 1992年2月，美国国家航空与航天局科学家宣布，北极附近的北半球源于氯氟化碳分解的一氧化氯处在前所未有的水平上，同时宣布这种情况可能引起欧洲、加拿大、俄罗斯和美国北部等许多地区臭氧空洞的发展。
