n. someone who shows the way by leading or advising
n. a structure or marking that serves to direct the motion or positioning of something
v. be a guiding or motivating force or drive
v. use as a guide
n. 引导者, 导游, 指南, 路标
vt. 指导, 支配, 管理, 带领, 操纵
vi. 任向导
[计] 辅助线