降落伞突然瘪了,他从300英尺的高空跌落到地面。He plunged 300ft to the ground when his parachute collapsed.这种不安情绪使股票价格跌落到几乎18个月以来的最低水平。The upset sent share prices sliding to their lowest level for almost 18 months.猫在跌落时能够大难不死是有事实作为依据的.A cat...
Ankylosing Spondylitis ( AS ) is a form of arthritis that involves primary the spine.强直性脊柱炎 ( AnkylosingSpondylitis,AS ) 是以中轴关节慢性炎症为主的全身性、免疫性、致残性疾病.Objective To study CT features of ankylosing spondylitis ( AS ) in sacro...