When the sunsets and darkness descends .

当日落与黑暗降临时。

We feel weightless when the elevator descends .

当电梯下降时，我们会感到失重。

How they work : one or more nuclear warheads are mounted on a ballistic missile , and launched vertically . The rocket burns out in the upper atmosphere , then coasts to its programmed destination where the bomb descends and explodes .

工作原理：一个或数个核弹头安装在一个弹道导弹里，垂直发射，高空大气中火箭烧光燃料，滑行至设定目标，下降、爆炸。

The evening dust descends over tired wings .

傍晚尘降超过疲倦的翅膀。

Girl angel inside the pond descends to the world .

池塘里的女孩天使下凡。