He tried hard to exercise his stiff leg. 他努力鍛煉他那條僵直的腿。
A direct road runs through this field. 一條筆直的公路穿過田野。
The fact that the ice actually is moving can be readily proved by driving a straight row as stakes across the glacier. 冰川確實是在流動的這一事實,很容易通過在冰面上插入一批筆直的標樁來證明。