确定性涡点 point vortex: 点涡漩vortex point: 涡旋点; 旋涡点; 旋涡截面discrete vortex point: 不连续旋涡点point unit vortex: 点涡vortex dew-point hygrometer: 涡管露点湿度计下载手机词典可随时随地查词查翻译