ecology

城市发展不能以牺牲当地生态环境为代价。

Urban development must not come at the expense of the local ___ecology.

工业废物严重破坏了这条河流脆弱的生态系统。

Industrial waste has severely harmed the fragile ___ecology of the river.

石油泄漏对海岸脆弱的生态系统造成了严重破坏。

The oil spill caused terrible damage to the fragile ___ecology of the coast.