a half-hour drive的用法和样例：
- The Cachapoal valley is located in the warm, central part of Chile, a two and a half hour drive from Santiago, Chile's capital city.
- Despite the two and a half hour drive from Santo Domingo to Bombita in Barahona province, volunteers greet Tropical Storm Noel victims with the brightest smiles as soon as they get off the bus, hoping to cheer them up.
- About one and a half hour's drive.
- She will be a half hour late,as usual.
- I'll meet you at the zoo in a half hour.