长期来看，非一次性产品的价格较低，但维修成本较高。
Nondisposable products are less expensive in the long term but can be costly to repair.
价格的一次性上涨不会使通胀持续加大，除非它提高了公司和劳动者对未来通胀的预期，这种期望是可以自行实现的。
A one-off rise in prices would not produce a sustained increase in inflation, unless it boosts firms' and workers' expectations of future inflation, which can become self-fulfilling.
大宗商品价格的一次性跃升不是通胀，也不一定会引发通胀。
A one-off jump in commodity prices is not inflation. Nor need such a jump cause inflation.
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