walk-on

n.

跑龙套角色；临时队员；次要演员；

adj.

出现于舞台上的；

复数：walk-ons

1. He was on the cusp between small acting roles and moderate fame.
   他这个配角演员现在已是小荷初露尖尖角。
2. We have several alternates on our team.
   我队有几名替补队员。
3. Firemen turned their hoses on the flames.
   消防队员将水管对准火苗。

Synaptophysin: leading actor or walk-on role in synaptic vesicle exocytosis?
Perceiving 'Walk-on-able' Slopes
Bituminous composition with improved ‘walk-on-ability’ and its use in roofing applications
Direct monitoring of the electrostatic charge of house-flies ( Musca domestica L.) as they walk on a dielectric surface
Scaling limits of the uniform spanning tree and loop-erased random walk on finite graphs
Numerical Optimization of a Walk-on-Spheres Solver for the Linear Poisson-Boltzmann Equation
Planar or three-dimensional ceiling latticework consisting of bars and joint-fittings, in particular a walk-on ceiling lattice
Catalytic branching random walk on three-dimensional lattice.
Regulatory T cells in stem cell transplantation: main characters or walk-on actors?
Walk-on tray for concealing a pool cover operation system