人类活动已经对生态系统造成严重破坏。
Human activities have given rise to severe damage to the ecosystem.
暂无解析
工作压力过重会导致抑郁，焦虑，甚至自杀。
Weareintroducingourselvesasoneoftheleadingexportersofthesamelineofbusiness.
We are please to give you an order for 3,000 computers in current stock at the prices you quoted.
兼职要求学生遵守纪律并相应地分配时间。
世界原油出产可定满足不了全球需求。