前拨是自行车变速系统的重要组成部分，负责牙盘档位准确快速的升降。来让自行车车手适应不同的路况。
亚利桑那州从未采用新的时间制，因为夏天把时钟“前拨”一小时就太热了。
Arizona never adopted the new time plan on the grounds that it was too hot out to "spring forward" an hour in the summer.
今晚，我呼吁国会在相关投票前将所有请求拨专款的要求公布在同一个网站上，以便美国人民能够看到他们的钱是怎么花的。
Tonight, I'm calling on Congress to publish all earmark requests on a single website before there's a vote so that the American people can see how their money is being spent.
有十个州根本就没有给学龄前儿童提供任何资金；而有些州只是随意地拨些款而已。
Ten states do not provide any funding at all for preschoolers, and some appear to fund it only haphazardly.
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