(4252期)描述一个有用的发明 Describe an invention that is useful in your daily life

It is a certainly useful invention in our life 这发明挺有用的 Helpful 有帮助的 Efficient and effective 有效果的 For fun 找点乐子 为了乐趣 Fatigues and bad emotions would be gone 疲倦和坏情绪会消失 Diminished or gone 消除 Occupy 占据 Environmental issues 环境问题 Problem 问题 Ride bicycles 骑车 Stay fit 保持好身材 Stay healthy 保持健康