It's not much, but it's two times more than 10 years ago. 虽然不多 但是10年前的两倍

502. It's too late to be a pessimist.
     悲观为时已晚
503. Governments have acted to protect nearly
     各国政♥府♥保护了
504. Two percent of the world's territorial waters.
     世界上接近2%的水域
505. It's not much, but it's two times more than 10 years ago.
     虽然不多 但是10年前的两倍
506. The first natural parks were created just over a century ago.
     第一个自然公园创建于一个世纪前
507. They cover over 13% of the continents.
     覆盖了整个大♥陆♥13%的区域
508. They create spaces where human activity is in step...
     它们创造了一个空间 那里人类的活动

来自《家园 第二部分 Home Part2》第 505 行