directionn.方向;指导;用法说明;趋势;目标;管理
direction grid方向栅格
directionalityn.方向性;定向性
direction time引导时间
direction pair标志线对
direction angle坐标方位角,方向角
direction plane方向平面
"a directional microphone"
"he tried to explain the directional trends of modern science"
"felt his mother's directing arm around him"
"the directional role of science on industrial progress"