Weighing in at eighty tons, the B-19 was easily the largest and most sophisticated warplane in the world.B-19重达80吨，无疑是世界上最大、最先进的军用飞机。Arad was the navigator of an Israeli warplane that crashed in Lebanon in October 1986.A...
The surgeon cut through connective tissue to expose the bone.外科医生割开结缔组织,让骨头露出来.The dermis is composed of the connective tissue that supports the epidermis.真皮是由支撑表皮的结蒂组织构成的.It is also encased in membranes of connective ti...