The protective link of the frequency converter is one of the key links which guarantee its safe and reliable performance.

变频器的保护环节是保证其安全可靠运行的关键之一。

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While it's too soon for the researchers to establish a direct link between the consumption of teaand the absence of heart disease, they do recognize the natural protective properties of thedrink.

虽然研究人员在饮茶和没有心脏病之间建立的直接联系为时尚早，但是他们确实认识到茶的天然保护特性。

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Danger 'highlighted 'the researchers from the University of California say the link may be counteracting the known protective effect of the hormone oestrogen on the heart.

这种危险“突出”。来自美国加州大学的研究人员说，该链接可能抵消已知的雌激素对心脏的保护作用。

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