插入以在一排物品中保持空间开放的物体,如珠子或印刷字体
插入以在一排物品中保持空间开放的物体,如珠子或印刷字体
An object inserted to hold a space open in a row of items, e.g. beads or printed type.
在太空工作或生活的人
A person who works or lives in space.
衬套
A bushing.
哮喘患者使用的一种附加装置,以提高定量吸入器的效果
A type of add-on device used by an asthmatic person to increase the effectiveness of a metered-dose inhaler.
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