人类活动已经对生态系统造成严重破坏。

Weareintroducingourselvesasoneoftheleadingexportersofthesamelineofbusiness.

It’s our hope to continue with considerable business dealing with you.

我们认为你的还盘不合理，因为这种材料的价格目前呈上升趋势We should be please to allow you the requested discount of 5% ,if you will to raise your order to 50,000 pieces.

竞争激烈的运动项目不适合年纪特别小的孩子。