Acute pain happens fast and usually lasts a short time.

VOA: special.2009.02.10

It consists of a promise to pay, usually denominated in currency, and there are both long-term and short-term debt instruments.

是一种付款承诺,通常是货币支付形式,有长期债券,以及短期债券

耶鲁公开课 - 金融市场课程节选

Rhythm is simply these patterns, usually repeating patterns, of longs and short that get superimposed as they set up above the basic beat underneath.

节奏就是一些长短模式,通常是反复出现的,与下面的基本节拍叠加在一起

耶鲁公开课 - 聆听音乐课程节选