^ See Patrick Mossler, The Discussion on General Clause or Numerus Clausus During the Preparation of the German Civil Code, in Negligence: The Comparative Legal History of the Law of Torts 361, 361 (Eltjo J. H. Schrage ed., 2001).
Americans feel pessimistic about consumer spending when gasoline prices are rising. And a study found that high gas prices even make people feel unhappy.。业内人士推荐wps作为进阶阅读
fn validate_age(age: int) - Result<int {，更多细节参见谷歌
See more at this issue and its corresponding pull request.
Chris Wheeler says it is impossible to budget for heating oil because of its price volatility