This interface defines a contract with three methods, as shown in Listing 1.

这个接口定义了一个有三个方法的合约，如清单1所示。

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You can see in Listing 6 that two methods are needed to fulfill the data source contract.

在清单6中可以看到，实现数据源合同需要两个方法。

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The compiler can perfectly well figure out which types of exception t could hold and prove that Listing 1 will not violate the contract of foo - without making the programmer jump through hoops.

编译器可以非常清楚地找出哪种类型的异常t可以保留并证实清单1不会违反foo的合同—而无需程序员赴汤蹈火。

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In Philadelphia, with a four and a half month median time on market from listing to contract, prices are down by 5.3 percent.

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To hold onto the contract overnight, it's necessary to post a margin that depends on the contract's volatility and is set by the listing exchange.

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Merely five days after a listing flyer hit my mail box, the unit was already in contract for the full asking price.

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