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...
He blamed lack of parental control for the young tearaways' behaviour.他认为，那些小流氓行为不端是因为缺少家教。Parents are entitled to 13 weeks' parental leave.父母可以休13个星期的亲子假。Parental attitudes vary widely.家长态度千差万别。...