Whether you’re cranking the throttle, hitting the pedals or both, a shift of gears provides easier climbs or declines in grade, with less of a toll on the bike’s battery.
不管你是要扣紧刹车、要蹬踩踏板或者两者同时，变速轮之间都可以轻松变换以顺利实现提速或减速，而自行车的电池耗电会比较少。
Its macro-level impact is likely to be minimal—especially as it was accompanied by a reduction in the rebates available for other, polluting products like high-grade zinc and some types of battery.
其在宏观方面的影响可能是微乎其微，特别是因为减少退税也有利于其他污染产业，如高含锌量电池以及其它类型的电池产品。
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