他两分钟就能搞定，时间成本低，而且也就是一块闸皮的事儿，材料成本低，所以便宜。
He finished it only two minutes, cost a little time, and only a piece of brake lining, a little material, so it's cheap.
他两分钟就能搞定，时间成本低，而且也就是一块闸皮的事儿，材料成本低，所以便宜。
He finished it only two minutes, cost a little time, and only a piece of brake lining, a little material, so it's cheap.
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