Reinforced concrete structure of seaport wharf is located at severe natural environment and work condition, and erosion from seawater damages seriously the durability of structures.
海港码头钢筋混凝土结构处于恶劣的自然环境和工作环境中，海水的侵蚀严重危害结构的耐久性。
With the sharp drop in the stock of natural resources and the severely damaged ecological balance, the living environment of human beings has also been a severe challenge.
随着生态平衡遭到严重的破坏以及自然资源存量的锐减，人类的生存环境也受到了严峻的挑战。
Buried pipelines are widely used in the transportation of liquid and gas media such as crude oil and natural gas. Because of severe working environment, leakage and explosion are likely to happen.
埋地管道在石油、天然气等液体和气体介质的输送中得到广泛使用，由于其所处环境和工况相对恶劣，因而具有泄漏污染甚至爆炸的潜在危险性。
However, due to the overfishing and over killing and pollution of their living environment, the tailed amphibians are losing their natural habitat and are in severe danger.
但由于滥捕乱猎、栖息地丧失、破坏、污染以及异种侵入等原因，已造成有尾两栖动物的渐危和濒危。
However, due to the overfishing and over killing and pollution of their living environment, the tailed amphibians are losing their natural habitat and are in severe danger.
但由于滥捕乱猎、栖息地丧失、破坏、污染以及异种侵入等原因，已造成有尾两栖动物的渐危和濒危。
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