1.  velocity ratio
2.  speed ratio

• 1. 速度比: velocity ratio | speed ratio | renal aor-tic ratio
• 2. 叶尖速度比: tip-speed ratio | tip velocity ratio
• 3. 腐蚀速度比: etch ratio

更多释义

• 1.嘉贝拉上今年排名榜的速度比之前任何新上榜的歌手都快。
  Gabrielle entered this year's charts faster than any first-timer before her.
  dict.yoduao.com
• 2.据说，承诺的下载速度比 4G 快10到20倍。
  It is said that it promises download speeds 10 to 20 times faster than 4G.
  dict.yoduao.com
• 3.事实上，北极海冰的融化速度比预期的要快。
  Indeed, sea-ice cover in the Arctic is melting faster than expected.
  dict.yoduao.com

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