效率为多少
What is the efficiency?
以上为机器翻译结果，长、整句建议使用 人工翻译 。
混合燃料汽车只是为城市居民设计的，在高速路上其效率会降低。此外，我还不知道到时更换电池时要花多少钱。
Hybrids also are only designed for cities, as their efficiency decreases on the highway. Plus, I never seem to hear about how much those batteries cost once replacement time arrives.
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