Someday, they say, the new procedure may be an alternative for the kind of lower-risk patients who now have to have their chests opened to replace diseased aortic valves.

他们说，有一天，对于现在必须开胸更换病变的脉瓣的低风险患者，这一新的过程可能是一种替换选择。

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We stood in the market - place, and the negroes uncorded the bales of figured cloths and opened the carved chests of sycamore.

我们站在市场上，黑人们揭开花布包囊，打开悬铃木箱子。

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