Flexible - Any incompatible change results in a new version of the service contract, and the contract is designed to support backwards compatibility but not forwards compatibility.
灵活——所有不兼容的更改导致服务契约的新版本，契约的设计支持向后兼容，但不支持前兼容。
With Germany currently playing with a lone striker, Low has not ruled out the possibility of using both forwards in tandem.
针对目前德国队使用单前锋的战术，勒夫并不排除会使用双前锋前后站位的战术。
Forwards do remain an issue for Capello and that is underlined now that the injured Emile Heskey will not be on the scene to enjoy the so far fruitful partnership with Wayne Roney in Doha.
然而前锋人选仍然让卡佩罗挠头。现在看来，伤病缠身的赫斯基可能不会出现在多哈赛场上，与鲁尼打出行云流水般的配合了。
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