1. On the descents, cyclists spin past cars, freewheeling downhill at tremendous speed. 在下坡道上，自行车手们飞快地掠过汽车，靠惯性极速冲下山去。
2. The book is full, you will see, of a number of descents and ascents. 你们将会读到，本书充满一些下降与上升的句子。
3. This full-size training version of the Soyuz capsule is used to practice launches and descents. 联盟号原尺寸复制的训练舱用来练习发射和降落。
4. Previous rovers have deployed parachutes to slow their descents, and have then crashed into the ground using airbags to cushion their impacts. 先前的探测器使用降落伞降低下降时的速度，砸向地面时有安全气囊缓冲撞击的影响。
5. But stand volume descents to a great extent, age class and stand density structure are maladjusted badly, and the number of stand growth is low. 但蓄积量大幅下降，林分的龄组、密度结构严重失调，林分生长量偏低。
