Your companions are like the buttons on an elevator. They will either take you up or they will take you down.
朋友就像电梯上的按钮：他们或者带你上去，或者带你下来。
Whether you take the elevator to the top of the Hancock Tower or whether you walk up the stairs, the change in gravitational potential is identical.
不管你是乘电梯，去大厦的顶层，或者是步行，重力势能的变化是相同的。
Whether you take the elevator to the top of the Hancock Tower or whether you walk up the stairs, the change in gravitational potential is identical.
不管你是乘电梯，去大厦的顶层，或者是步行，重力势能的变化是相同的。
应用推荐