At that time the United States pioneered the development of serious damage to the ecological environment of the buffalo and the the number of it was serious decline.

由于当时美国的开荒者为了开发严重破坏了水牛的生态环境，水牛的数量严重下降。

youdao

Moreover, the new concepts of ecological optimization criterion and finite time availability are presented.

同时，还介绍了生态学优化准则及有限时间可用性等新概念。

youdao

Through case study, find the bronze drum can use in the locality for a long time, there is connection that can't be isolated with the local unique ecological environment and culture factor.

通过个案研究，发现铜鼓在当地之所以能够长期使用，与当地独特的生态环境和文化因素有着紧密的联系。

youdao

The world will regret having spent so much time debating global warming while the real ecological threat, access to cheap safe water, becomes obvious.

FORBES: Twenty Trends For The 2010s

Perhaps now is the time for me to consider a more formal return to ecological study?

BBC: By Hugh Warwick

To be sure you are marking a fundamental change in human society borders on the impossible--such events happen just a few times a century, and (barring things like ecological collapse) rarely with anyone's ability to see at the time that anything has changed.

FORBES