ecologically

The island is ecologically fragile, and excessive tourism could destroy its unique bird populations.

(Chinese) 该岛在生态上很脆弱，过度的旅游业可能会摧毁其独特的鸟类种群。

The farmers decided to use ecologically sound methods, such as natural pest control, to grow their crops.

(Chinese) 农民们决定使用生态健全的方法，如自然害虫控制，来种植作物。