全球变暖对北极熊等动物的生存造成了严重威胁。
Global warming has posed a serious threat to the survival of animals such as polar bears.
原油的蔓延扩散超过了165平方英里，对海洋生物和水质造成了严重威胁。
The spill spread over 165 square miles and posed a serious threat to both sea life and water quality.
但液化气是易燃易爆的物品，随着起用量不断增加，它在运输和贮存过程中发生的爆炸事故，对人类正常的生产和生活造成了严重威胁。
Because lpg is combustible and explosive material , with increasing of its consuinption , accidents of lpg occur somctimes in transportation and storage.
农药曾经为人类控制生物病虫害作出过巨大贡献，但是农药污染也破坏了生态环境，对野生鸟类的生存造成了严重威胁。
Pesticide has made a great contribution on controlling plant diseases and insect pests, however it also contaminated ecological environment and threatened the security of birds.
农药曾经为人类控制生物病虫害作出过巨大贡献，但是农药污染也破坏了生态环境，对野生鸟类的生存造成了严重威胁。
Pesticide has made a great contribution on controlling plant diseases and insect pests, however it also contaminated ecological environment and threatened the security of birds.
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