You can tell when you are over the top and on the downward slope, by asking yourself a number of questions.
你可以通过问自己一些问题来判断自己什么时候越过了顶峰,什么时候处于下坡。
2
Particles placed at the topof either slope would fall down to the bottom under the pull of gravity. Particles placed at the bottom of either slope would go nowhere.
在重力的拉动下,放在任何一个斜面顶部的粒子都会滚到底部,而放在底部的粒子会保持不动。
3
The smell of the wildebeest was sour. At the topof the slope, the house was still dark.