Bacterial concentrations are higher during exacerbation than during stable disease; however, these studies are cross sectional and devoid of strain typing.

虽然疾病加重期的气道细菌浓度高于稳定期，但是，以前的研究均为横断面研究，且缺乏菌株分型。

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Fans say it lets them type at blazing fast speeds, with less strain on their hands and wrists than typing on a conventional keyboard.

粉丝们说他们用它能以超级快的速度打字，并且能减轻打字时手的疲劳。

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Excessive amounts of typing is a well-known cause of carpal tunnel syndrome (CTS), which is a painful wrist strain that can go up your arm.

打字太多会引起腕管综合症，症状是手腕紧张疼痛，甚至还会影响到整个手臂。

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It also features an ergonomic island keyboard, increasing the stylish looks while reducing users' wrist strain when typing for extended periods.

ENGADGET: Samsung N230 netbook ships with 13.8 hours of pretend fun