However, phone companies warn prolonged use can damage the phones.

但手机公司警告说，长期使用这种充电器可能对手机造成损害。

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For example, prolonged use of antibiotics increases your risk of a yeast infection.

例如，长期使用抗生素会增加患念珠菌症的风险。

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Cystitis and urethritis are complications of prolonged use of indwelling catheters.

膀胱炎和尿道炎是长期应用留置导尿管的并发症。

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By using a capacitor instead, Mazda saves weight and space and, unlike a battery, it can charge and discharge instantly without deteriorating during prolonged use.

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While oral contraceptives have a good safety record (and Barr Laboratories' trial of 1, 400 women showed no evidence that Seasonale is riskier than conventional contraceptive pills, except for a higher incidence of irregular bleeding in the first few months of use), Dr Hitchcock is keen to see women exercise caution when it comes to prolonged use of anything containing sex hormones.

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The next phase will attempt to find out if prolonged Pill use pushes back the menopause, as this theory suggests it should.

ECONOMIST: The Pill