often \ constant\ usual \frequent 的区别是什么?

constant 和 frequent 和 persistent 的区别? usual ordinary common frequent区别 frequent common ordinary general regular的区别 ansys中 real constant 和 element section的区别是什么? consistent和constant的区别? constant 和continous的区别 constant和continuous的区别 normal 和usual 的区别 normal和usual的区别 constant continual continuous 的详细区别, constant,consistent,continual,contuous的区别 请教constant 和 consistent 的区别