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.

我才在这里工作了两天，但感觉像是一辈子。

I've only been working here two days, but it seems like a ___lifetime.

这种质量的手表应该能用一辈子。

A watch of this quality should last a ___lifetime.