单词	far and few between
释义	far and few betweenphr.① 稀少
随便看	rotational inertia coeffcient rotational instability rotational invariance rotational irrigation rotational isomer rotationality rotational kinetic rotational kinetic--energy rotational latency rotational lattice vibration rotational level rotational line rotational loss rotationally cooled laser-induced fluorescence rotationally sampled wind velocity rotationally symmetrical luminous intensity distribution [of a source] rotational mach number rotational magnetic hysteresis rotational medium rotational method rotational mode rotational mold rotational molding rotational momentum rotational motion