Steel has given a figure of "20 hours" when describing her "exhausting" process in the past, "I started the book and didn't leave my desk until the first draft was finished."
We knew the density of steel, and so you can figure out the mass, just take my word for it.
我们知道铁的密度，所以你能算出质量，相信我说的。
3
The report claims that the industry's overcapacity is illustrated by "a startling figure" : in 2008, China's output of steel per person was higher than America's.