Each sequence is made of transgressive system tracts and highstand system tracts.认为娄山关组由7个三级层序组成,层序界面为古岩溶不整合面或暴露带,每个层序都由海进体系域和高水位体系域构成.Highstand System Tract mainly develops depositional system of offshore - meare, fluvi...
他侦察敌人兵力薄弱的位置,对其要塞不予理睬。He probes the enemy's weak positions, ignoring his strongholds.只要塞进一张纸就行。Just slip in a piece of paper.这座要塞遭到空袭时无法防御.The fort cannot be defended against an air attack....