SaaS has as its central defining characteristic the ability for customers to use a software application on a pay-as-you-go subscription basis.

SaaS区别于其他应用程序的主要特征就是能够使客户在使用应用程序时按照使用量付费。

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Whether regarded as a science, an art, or a skill---and it can properly be regarded as all three---logic is the basis of our ability to think, analyze, argue, and communicate.

无论视之为一门科学，一种艺术，或者一项技艺---其实说逻辑是所有这三者也是恰当的---逻辑是我们思维，分析，论证和交流能力的基础。

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However, over time, this requirement is likely to be no longer guaranteed under the impact of factors such as the attack on the mathematical basis of the hash function or the ability to compute.

然而随着时间的推移，这一要求很可能在针对散列函数数学基础的攻击或者计算能力提升等因素的冲击之下不再具有保障。

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Theobald argues that Avangate beats out such competition on the basis of its superior agility and its ability to make it easy for customers to manage potential channel conflict as they try to sell both through a direct sales force and through hundreds of resellers.

FORBES: Avangate Is Changing How Software is Sold