These results indicate that SV increases when HR decrease,but the change of stroke volume is very small when HR is smaller than90/min,and the relative variation is not greater than3%.是什么意思_These results indicate that SV increases when HR decrease,but the change of stroke volume is very small when HR is smaller than90/min,and the relative variation is not greater than3%.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句