British soldiers secure the road around Basra airport in 2007.英军士兵2007年在巴士拉机场了周围的道路警戒.Scenario: The Iraqi city of Basra suffers from severe gasoline shortages.情节: 伊拉克巴斯拉市为严重的石油短缺问题所苦.In the southern city of Basra, they f...
The base of scoin is cut diagonally to expose a large oval of cambium.接穗的基部被切成斜形,暴露出椭圆形的大圈形成层.The callus originated from several parts , but mainly from cambium.愈伤组织是多起源的, 但主要源于形成层.A tissue produced inwardly by the cork ...