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1·As such, they are key species for understanding and predicting impacts of global change on Antarctic and sub-Antarctic marine ecosystems.

因此，在理解和预测全球变化对南极和亚南极海洋生态系统影响方面，它们是关键物种。

2·These include the centuries-old custom of bul, where leaders would call a temporary stop to fishing for key species in order to give fish stocks an opportunity to replenish.

这些传统包括几个世纪以来被称之为“bul”的旧习俗，领导人会要求暂停捕捞一些重要种类的鱼，给鱼类总储备量繁衍补充的机会。

3·Top predators are key to keeping populations of key species from growing too large.

大型捕食者是使主要的物种种群不会生长过大的关键因素。

4·The extinction of key species could have cascading effects throughout the food web.

关键物种的灭绝可能通过食物链产生级联效应。

5·To protect key species is one of the important measures for keeping healthy life of the Yellow River.

关键物种的保护是维持黄河健康的重要措施之一。

6·Many key species have been overfished in some locations but still have thriving populations elsewhere.

在某些地方，鱼类的许多重要品种已被过度捕捞，而在其他地方却仍然繁殖旺盛。

7·And then it presents the system frame and system running flow. At the same time the thesis details the key species and functions.

接着根据该模型给出了系统体系结构和系统的运行流程，并对程序设计中涉及到的比较重要的类和函数给出了详细描述。

8·Conservationists are concerned the drop in productivity, as a result of a lack of sandeels, will mean fewer breeding birds and continued decline of key species.

海鳗数量的减少会导致海鸟生育能力下降，也就是说，繁殖鸟以及一些重要的鸟类数量会继续减少。 对此，自然保护主义者表示密切的关注。

9·A bloom continuous Casting machine main cast quality steel and alloy steel, such as heavy rail steel, hard-line steel, spring steel, bearing steel, alloy structural steel, and other key species.

大方坯连铸机主要浇铸优质钢和合金钢，如重轨钢、硬线钢、弹簧钢、轴承钢、合金结构钢等重点品种。

10·Its conservation is key to the sustainable propagation of Antarctic species.

对它的保护对维持南极物种繁衍可持续性来说很关键。