Each group could again be divided into left and right ventricular type by the anatomical feature of the primary chamber.

根据主室腔的解剖特征，每类又分为左室和右室两型。

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According to the morphological characters of primary chamber, each group could be also divided into left and right ventricular type.

根据主室腔的解剖特征，每类又分为左室和右室两型。

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The chamber recently released the results of an opinion poll that showed that homelessness and "street behavior" were the primary concerns of residents here.

前不久，商会公布了一项民意调查的结果，表明流浪者和“街头行为”是当地居民最关注的问题。

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The air lock installation is the primary objective of the Atlantis mission, with the two-room chamber allowing space station crews to venture from the station in NASA spacesuits without the assistance of visiting shuttles.

CNN: Air lock installed on space station