So the effective structure of the firebreak belt in the ridge mountain was the sparse structure.所以,山脊防火林带的有效结构为疏透结构.The proofing efficiency is closely correlated with the wind weather area of the firebreak tree belt.防火林带...
the epicenter of the international crisis.国际危机的中心The point on the earth's surface directly above is called the epicenter.地表上直接对着震源的那一点称为震中.It is a mystery how he located the epicenter.他是怎样测定震中的还是个谜.At the end of the...