The hearth and hearth bottom life of blast furnace is one of the key factors affecting blast furnace life.

高炉炉缸和炉底的寿命是影响高炉长寿的关键因素之一。

youdao

I beg you, from the bottom of my heart, to spare his life.

我诚心诚意地恳求你饶他一命吧。

《牛津词典》

The bottom line is : You're living your life and you make it either happy or sad.

底线就是：这是你的生活，只有你自己能决定自己的生活是否开心。

youdao

But that bottom-line number conceals a widening divergence between the family patterns of the college-educated top one-third, where family life is increasingly stable, and those of the non-college-educated bottom two-thirds, where family life is increasingly disrupted.

CNN: Straight marriage is the real issue

It's the family life of the bottom two-thirds that is the family policy challenge of the 21st century.

CNN: Straight marriage is the real issue

Wait for four months and then score the time spent which either improved the bottom line or made your life better.

CNN: Why the best thing you can do is fail