我左臂严重擦伤，并有轻微脑震荡。My left arm is badly bruised and I was slightly concussed.这本书的情节引人入胜,并有许多巧妙的对白.That book has a good plot and much clever dialogue.微体可能有其自身的DNA并有一定程度的自主性.Microbodies might possess their own DNA and have so...