When snorkeling, do not touch the coral or stir up sediment, as these actions can damage the reef's fragile ecosystem.
潜泳的时候，不要碰珊瑚礁或者搅动沉淀物，因为这样做可能会破坏珊瑚脆弱的生态系统。
We will never be able to see or study this fragile ecosystem.
我们将永远无法看到或学习这个脆弱的生态系统。
Will these alien genes harm the fragile ecosystem upon which we all depend?
这些异种基因会不会破坏我们赖以生存的、脆弱的生态系统？
We learn of complex water habitats and a fragile ecosystem of flora and fauna.
导游向我们介绍，这片水域生境的植物和动物生态系统复杂而脆弱。
Surrounded by a desert, Dunhuang has an extremely arid climate and a very fragile ecosystem.
由于地处沙漠中央，敦皇的气候极其干旱，生态系统也非常脆弱。
Southwest China is one of the three distribution centres of Karst in the world, and it is the typically fragile ecosystem.
我国西南地区是全球喀斯特三大分布中心之一，属于典型的脆弱生态系统。
It is a kind of fragile ecosystem that is very difficult to restore once it is extinct and eventually turns into mobile sand.
这种生态系统非常脆弱，一旦消失很难再恢复，最终变成流沙。
But as global warming snakes its way into higher altitudes, a less-welcome resident in taking up space in this fragile ecosystem: the mountain pine beetle.
但是随着全球变暖向高海拔地区蔓延，一个不受欢迎的居民进入了这个脆弱的生态环境：山地松树甲虫。
Countries with ties to Antarctica have adopted US proposals to limit tourism in the region, in a bid to protect the fragile ecosystem of the continent.
南极洲周边各国采取了美国的建议，为了保护南极洲脆弱的生态系统而限制其周边地区的旅游。
Haute couture, what remains of it, is a little like a fragile ecosystem under siege by modern tastes and habits, and by couturiers who are stuck in the past.
高级定制，还健在的，有点像被现代审美品位和在历史中不能自拔的国家所包围的脆弱生态系统。
But it still had an unexpected fallout: So many people (the rich, of course) were alerted to it, that demand shot up and the fragile ecosystem where it grows is now threatened.
纪录片仍出现始料未及的结果：那就是太多的有钱人开始注意它，需求涌动，导致当地脆弱的生态系统面临威胁。
Maritime security and protection of the fragile Arctic ecosystem will also be hot items on the agenda at the May 28 meeting.
海事安全和保护北极脆弱的生态环境也是5月28日会议议程的重要议题。
Tillage practice had important effect on soil nutrients loss and soil degradation in the fragile karst ecosystem.
耕作对喀斯特脆弱生态系统土壤具有重要影响，是造成土壤养分流失、退化的主要原因。
As one of populous artificial ecosystems in the ecology domain, the security of urban ecosystem is more fragile.
作为人口高度集聚的人工生态系统，城市生态系统的安全性更加具有脆弱性。
Because of thin solum and lower soil loss tolerance, the ecosystem in Karst region is very fragile. The vegetation is difficult to recover after destruction.
喀斯特区由于土层薄、土壤允许流失量低，生态系统十分脆弱，植被破坏后难以恢复。
WWF and our partners have facilitated the reconnection of 17 lakes to the Yangtze River, infusing new life to its fragile freshwater ecosystem.
与合作伙伴共同努力，恢复了17个湖泊与长江的连通，令长江中游的淡水生态系统重现生机。
Chongqing is one of the largest inland mountainous cities in China, where the activities of human beings are intense and the ecosystem is fragile.
重庆市是中国最大的内陆山区城市，人类活动强烈，生态系统脆弱；
Chongqing is one of the largest inland mountainous cities in China, where the activities of human beings are intense and the ecosystem is fragile.
重庆市是中国最大的内陆山区城市，人类活动强烈，生态系统脆弱；
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