Herds of Lystrosaurus are an easy target. 水龙兽群很容易受到攻击
Monoculture is easy, productive and rapid. 单一栽培简易 高产且生长迅速
It wasn't easy, but seeing the penguins get what they deserve 这并不简单 但看到企鹅们得到应得的待遇
We can rest easy with Roberto on the lookout. 多亏罗伯托外出巡逻 我们才能安眠