the surface of our planet has undergone a sudden change. 地球的表面发生了突然的变化
The sudden blaze of sunlight will bring life to the forest floor. 太阳一瞬间的光辉也能给森林地表带来生命
The calf must stay close to its mother to avoid getting lost in the sudden blizzard. 小牛必须紧跟着母亲 才能避免在突如其来的暴风雪中迷路
A sudden flush of vegetation is what every desert dweller waits for, 植物的突然兴盛是 所有沙漠动物都盼望的事