It means that all third party applications are online only.

也就是说所有第三方应用都只是在线的。

youdao

The losers, said retail analyst Neil Saunders, are online-only retailers, especially smaller ones.

零售业分析师尼尔·桑德斯表示，受影响的是那些只做网上业务的零售商，尤其是那些规模较小的零售商。

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If that question later appears online, only a handful of people would know to put it there.

如果此题目随后在网上出现，只会有少数那么几个人懂得将其摆上网(即可将作弊范围限定到这几个考生中——译者)。

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Online advertising sales in China are estimated to bring Google only a few hundred million dollars a year.

VOA: special.2010.01.15

Only 6% has moved online.

只有6%在网上进行。

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BrightSpark Education says the online tutoring is used only as an addition to supplement regular teaching.

VOA: special.2011.04.21

But I know, vaguely (online only, just to be clear) one of the authors.

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As a result, like Hollywood, big gamemakers focus on successful franchises with fancy effects and plenty of action and have moved online only hesitantly.

ECONOMIST: Video games move online

Oppa, whose name comes from a Portuguese expression for surprise, is online only, eschewing brick and mortar stores to keep costs low and production efficient.

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