褐炭は炭素含有量が低く、水分含有量が高い石炭の一種です。
It is incumbent on you to do so.
Brown coal is a type of coal with a low carbon content and high moisture content.
The formulation of the new policy took several months.
Don't have an account? Sign up
Do you have an account? Login
DiQt
Free
★★★★★★★★★★
