He wore his cleanest slacks, a clean shirt and a navy blazer.他穿着他最干净的便裤，洁净的衬衫和藏青色上装。She was wearing black slacks and a white sweater.她身穿黑色便裤和白色毛衣。The affable Keefe a friendly smile cherubic countenance , a checked sports...
飞机的副翼是用铰链装在机翼上的.The ailerons on an airplane are hinged to the wing.正的副翼偏转角产生绕X轴的负方向力矩.Positive aileron deflection produces an anti - clockwise moment about the X axis.副翼是机翼后缘的可动部分.The ailerons are movable sections along ...