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.

这个方案支持商业——那么，就由居民来选择是商业还是生态。

This solution supports business - well, then it's up to the residents to choose either business or ___ecology.

城市发展必须仔细考虑其对当地生态的影响。

Urban development must carefully consider its impact on the local ___ecology.