解释:大部分鸟类都是雄性的,而雌鸽却是雌性的,说明了鸟类性别的特殊性。
We must invest in research to make aquaculture more efficient and less impactful on marine ecosystems.
In the wild, every decision can mean the difference between life and death.
写作就是面对存在的混乱并强加某种秩序。
Efficiency is doing things right; effectiveness is doing the right things.