The observations also show for the first time that a white dwarf can create a cavity around it before blowing up in a Type Ia event.

观测结果还首次显示，白矮星在爆炸成为Ia型超新星之前，会在其周围创造一个空洞。

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The box type structure, cavity cannot antirust paint corrosion, in order to prevent moisture intrusion corrosion beam cavity, sealing the inner cavity of the main girder must keep.

箱型结构的主梁，内腔无法涂漆防锈蚀，为了防止水汽侵入腐蚀主梁内腔，必须保住主梁内腔的密封性。

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Based on a miniaturized microwave cavity developed by ourselves and the separated filter technique, a new type of cavity-cell assembly for gas cell rubidium frequency standards was made.

在自行研制的一种小型化微波腔的基础上，新近研制出采用分离滤光技术的气泡型铷频标腔泡系统。

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