1. The plane came down safely on the runway.

2. The temperature came down after the storm.

3. The building came down during the earthquake.

4. They came down from the sky in a parachute.

5. I will come down to meet you.

这些句子都简洁明了地表达了“come down”的基本含义，即“下来”或“崩塌”。希望这些例子对你有所帮助!