You start by running 5 km, move up to a 10 km, then a half marathon.
你先跑5公里，再跑10公里，然后跑半程马拉松。
The typhoon is expected to move northwest at 20-25 km per hour.
预计台风将以每小时20至25公里的速度向西北方向移动。
Typically they move in geosynchronous orbits about 22,300 mi (35,900 km) above the earth and operate at frequencies near 4 gigahertz for downlinking and 6 GHz for uplinking.
典型的通讯卫星位于地球同步轨道，约在地球上方35，900公里处，操作频率向地传输4吉赫，向上传输为6吉赫。
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