n.

1. 舵，舵柄，舵輪[C]
2. （政府、組織等的）領導地位[the S]
   How long has that man been at the helm?

   那人掌權多久了？

vt.

1. 給……掌舵；指揮

n.

1. a tiller or wheel for steering a ship or boat.
2. (the helm) a position of leadership.

v.

1. steer (a boat or ship).
2. manage the running of.
   ▸N. Amer. direct (a film).

n.