Just for the sake of this article, let's build a model to get a firmer grip on the notion "service".

仅仅出于文章的需要，让我们 构建一个模型来更加紧扣“服务”的概念。

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And by breaking the grip cellphone service providers had on content, Mr. Jobs opened the door for software developers in Asia and the rest of the world to reach consumers directly.

相关报道通过打破手机服务提供商对内容的牢牢控制，乔布斯为亚洲和世界其它地区的软件开发商打开了一扇大门，让开发商可以直接接触消费者。

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Soft, slippery, strong grip strength, good flexibility, fine performance of ozone proof, hardwearing, oil stain proof. A smaller friction factor Long service life.

该胶圈柔软光滑，握持力好、弹性好、抗臭氧、耐磨性好，摩擦系数波动范围小，使用寿命长。

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In recent years, the Internal Revenue Service has tightened its global grip by raising penalties for tax evaders and rolling out new reporting requirements for wealthy expatriates to share more information about their foreign bank-account holdings.

WSJ: Legal Hassles of Global Love Affairs | WSJ.Money Summer 2013

Gaudio, in his first major quarter-final, never lost his grip on the match and earned five more service breaks.

BBC: SPORT | Tennis | Gaudio too good for Hewitt