1. At the speed and height at which he was moving, he was never more than half a second from disaster. 以这样的速度在这么高的地方移动，他离灾难永远只有半步之遥。
2. It depends on the rate at which water enters the lake, and that depends on the rainfall and the evaporation rate. 这取决于水进入湖泊的速度，而这又取决于降雨量和蒸发率。
3. The formerly small supper after sundown becomes the big meal of the day, the only one at which the family has a chance to get together. 原本日落后的小型晚餐成为一天中的大餐，这是一家人唯一有机会聚在一起的时候。
4. So the formerly small supper after sundown becomes the big meal of the day, the only one at which the family has a chance to get together. 因此，原本日落后的小晚餐成为一天中的大餐，这是一家人唯一有机会聚在一起的时候。
5. As snow accumulates on a steep slope, it reaches a critical point at which the slightest vibration will send it sliding into the valley below. 当雪在陡峭的斜坡上堆积时，它会达到一个临界点，在这个临界点上，最轻微的震动就会使它滑进下面的山谷。
