The Internet is a powerful tool for education, but it is not a substitute for the teacher.
音乐是我的日记,记录着我的生活。
地球形状的问题本质上是引力和旋转共同作用下的平衡问题。
The future of leather tanning lies in balancing tradition with technology.
未来的计算将更加普惠,让每个人都能享受科技的红利。