Only then do they close in behind the herd. 这时他们才从背后接近野牛群
All he can do is watch the success of others. 只能看着别人幸福美满
All they can do is continue their migration 它们只能继续迁徙
But not all their challenges are to do with finding food and water. 但并不是所有的挑战 都与寻找食物和水有关
...and the locals do not like to share. 当地居民不喜欢分享
All the trilobite can do is try to stay out of reach. 三叶虫能做的只有设法保持距离
All we have to do is learn to cultivate the sun. 我们要学的是耕作太阳
All we have to do is stop drilling the earth and start looking to the sky. 我们所要做的就是停止钻地 看看天空