Hrv
[医][=heart rate variability]心率变异性
🗣️ 情景例句
How much for a haircut?
理发多少钱？
He has a telephone set.
他有一部电话。
For him, caves have the same peculiar fascination which high mountains have for the climber.
对洞穴探险者来说，洞穴有一种特殊的魅力，就像高山对登山者有特殊魅力一样。