"alternate"的定义和意义

happening in a back-and-forth pattern

serving as an substitute option

(of leaves, branches, etc) arranged on opposite sides of the stem in a staggered pattern

describing something that exists as a different or parallel version of something else

to arrange things or people so that they follow one after the other in a repeated and predictable pattern

(of an electric current, voltage, etc.) to change direction at regular intervals, with its value continuously fluctuating over time

to take turns doing something

to switch people between roles, tasks, or shifts in a repeated or organized way

to serve as an understudy for another actor, actress, or performer

something that can be chosen instead of another option