Our anticavity toothpaste has expiration dating.

我们的防龋牙膏有保质期。

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Expiration dating refers to starting a relationship that has a defined end date; for example, one of the people is moving soon.

“到期约会”指开启一段有“截止期”的恋情，例如，其中一方不久就要搬走。

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For instance, our anticavity toothpaste has expiration dating because over time, the fluoride becomes less available to your teeth.

比如说，我们的防龋齿牙膏有保质期，那是因为时间长了，里面氟的浓度就降低了。

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Economists warn that continued stalemate could trigger a recession as government spending is slashed, including for the military, and taxes go up on everyone, due to the expiration of lower rates dating to the administration of President George W. Bush.

CNN: STORY HIGHLIGHTS