名詞 stand-by:

1. something that can be relied on when needed
   同義詞：standby
2. an actor able to replace a regular performer when required
   同義詞：understudy, standby

動詞 stand-by:

1. not act or do anything
   同義詞：stand by
2. be available or ready for a certain function or service
   同義詞：stand by, stick around, stick about
3. be loyal to
   同義詞：stand by, stick by, stick, adhere

形容詞 stand-by:

1. ready for emergency use
   同義詞：standby

1. A special team of police were kept on standby during the time of violence.
   在發(fā)生暴亂期間，經(jīng)常有一支警察特別小分隊處于整裝待命狀態(tài)。