constant是什么意思
n.[数]常数，常量；不变的事物；永恒值
网络释义：常数；永恒的；不断；常量
constant怎么读（音标发音）
复数：constants
派生词: constantly
constant例句及用法
1 . There was constant jeering and interruption from the floor.
议员席上不断有人在嘲讽和打岔.
2 . It's a constant struggle to try to keep them up to par.
要让他们达标，需要不断努力。
3 . Constant wheelchair use will scuff almost any floor surface.
任何地板上经常有轮椅走动几乎都会有所磨损。
4 . The weather is a constant topic of conversation in Britain.
在英国，天气是交谈中永恒的话题。
5 . An automatic voltage regulator ensured a constant output from the generator.
一个自动电压调节器保证了发电机电流输出的稳定。
constant相关短语搭配
1 . 不恒定的常数
... J K|volume=|issue=|pages=32-39|id= |url=|format=|accessdate=和“不恒定的常数”（not-so-constant constant） cite journal|title=13 things that don't make sense|journal=New.
1 . 恒流充电
the charger adopts chip controlled charging , with constant current constant charging , overcharge protection , circuit protection and indications for charging status .充电器采用芯片控制充电，具有恒流充电、过充保护、短路保护、充电状态指示。
1 . 具有恒流
the charger adopts chip controlled charging , with constant current constant charging , overcharge protection , circuit protection and indications for charging status .充电器采用芯片控制充电，具有恒流充电、过充保护、短路保护、充电状态指示。
1 . 恒压恒频
constant voltage charger 恒压充电器constant voltage constant frequency 恒压恒频constant voltage excited transformer 恒压励磁变压器.