stand-by(expedition)pump

• 应急泵

英英释义

名词 standby:

1. something that can be relied on when needed

2. an actor able to replace a regular performer when required

动词 stand by:

1. not act or do anything

2. be available or ready for a certain function or service

3. be loyal to

形容词 standby:

1. ready for emergency use