With a flat regional structural relief and poor reservoir poroperm characteristics as background, the secondary migration of gas in the region is mainly driven by gas expansion.
在区域构造平缓和储层物性普遍较差的背景下，天然气二次运移以气体膨胀驱动为主。
2
The mechanism of realization of the secondary right of civil execution is the system of executive relief in essence.
民事执行救济权实现机制，实质就是民事执行救济制度。
3
Epilepsy should be more relief to learn some ways to avoid epileptic seizures in patients by the secondary damage.