All the relevant electric adjustment must be done by the professionals ONLY.

所有有关电气的调整必须由专业人员来完成。

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This air scaler is intended to remove dental plaque, calculus and stain from tooth surface and tooth root by dental professionals only.

本产品是由资质的口腔科医生在口腔科治疗过程中对患者的牙体表面所粘着的牙垢，牙结石，着色去除时所使用的设备。

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“The art market has changed,” Coulson says. “It has gone from professionals only to a kind of luxury retailing where you have no idea who you are dealing with.”

库尔森说：“艺术品市场已经变了，不再像原来那么专业，成了类似奢侈品零售的地方，你都不知道和你交易的这些是什么人。”

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But professionals are not the only ones getting concussions.

VOA: special.2009.10.28

"We weren't professionals in the beginning. They just took us in and we've gotten to watch not only what we have done with them but what they've done with a lot of other fabulous performers and musicians here on Maui.

VOA: special.2011.05.09

While some of their clients are middle class professionals from the community at large, many brothels will only accept a narrow clientele to make it difficult for law enforcement to catch them.

VOA: standard.2010.05.24

The moral being that this is a gadget for qualified medical professionals only, unless you have good insurance.

ENGADGET: Movie Gadget Friday: The Head Clamp from A Clockwork Orange

Writing in The Times, Martin-Jenkins says a maximum of 16 full-time professionals only should be contracted to a county and he insists on a salary cap.

BBC: County debate gathers pace

Relying on assurances of professionals may demonstrate good faith, but only when the professionals are acting independently from the entity promoting the claimed benefits.

FORBES: 5 Neglected Tax Developments of 2011