It is certainly very cheap. But as time changes, the chance may not come again.

这东西的确很便宜，但随着时间的变换，这种机会或许不再来。

youdao

It is true that these changes take a long time, but not as long as we might expect.

这些变化需要一些长的时间是事实，但不像我们所可能预期的那样久。

youdao

But the real value of the project will be the ability to map changes in the thickness of the sea ice over time, as further maps are produced.

但是该项目的真正价值是，随着更多地图的出炉，可以绘制海冰厚度随时间变化的地图。

youdao

Your mortgage payment is constant through time but the fraction of it that goes to paying off principal versus interest changes through time and it just changes as dictated by this formula.

抵押贷款每月还款是固定的,但是其中本金和利息的比例关系,会随时间而改变,这是由这个公式所决定的

耶鲁公开课 - 金融市场课程节选

But as treaty changes take a lot of time, we should also examine if there are possibilities already foreseen in the existing treaties.

BBC: Viewpoints on EU treaty change and eurozone

These changes take time but are necessary as this great nation is running out of cheap, short-term tricks.

FORBES: Is America A Nation In Decline?

The result will be an increase in magma production, but not at exactly the same time as the sea level changes.

FORBES: The Link Between Global Warming, Sea Levels And Volcanoes