Stipulatio duplae
双倍返还之要式口约
where the party receiving the deposit failed to perform its obligations under the contract, it shall return to the other party twice the amount of the deposit.
收受定金的一方不履行约定的债务的，应当双倍返还定金。
Cautio legatorum servandorum causa
信守遗嘱之要式口约
On the Scope of Damages Arising from Rescinding Contract for Material Breach;
因违约而解除契约之利益返还范围研究
Cautio damni infecti
关于潜在损害之要式口约，谨防未生损害之诉
Stipulatio poenae
罚金（违约金）要式口约
Legis actio per condictionem
要求令状的法律诉讼，请求返还之诉
That's about four times wider than an atom and more than 1,000 times narrower than a human hair.
一纳米大约有一个原子宽度的四倍，比人的一根头发宽度的千分之一还要细。
I got food coma after this greasy meal. I guess I need a double espresso or two.
不好意思，吃完这顿油腻的饭之后我有点昏昏欲睡的。我想我需要一、杯双倍义式浓缩咖啡。
Actio rei uxoriae(actio de dote)
返还嫁资之诉，妻财之诉
Condictio ob turpem vel iniustam causam
基于不名誉或不正当行为的要求返还之诉
Could I also have two cheap weekend returns to York for next Friday, please?
我还要买两张下星期五去约克的周末廉价往返车票。
I fthe party giving the deposit failed to perform its obligations under the contract, it is not entitled to claim refund of the deposit;
给付定金的一方不履行约定的债务的，无权要求返还定金；
The agency ask us to double the expense.
代理商要求出双倍价钱。
I wish I were young again.
要是我能返老还童多好
'You expect me to say as I'd sooner be young again.
“你要我说想返老还童。
Do you want a single or a return ticket?
你要单程票还是往返票?
Characterized by or consisting of two parts or components;twofold.
双重的以两部分或要素为特色的或由之组成的；两倍的