lifetime

这种质量的手表应该能用一辈子。

A watch of this quality should last a ___lifetime.

婚姻不再总是被视为一生的承诺。

Marriage is no longer always seen as a ___lifetime commitment.

我期望在我的一生中看到更多的技术变革。

I expect to see a lot more technological change in my ___lifetime.