capsule [ˈkæpsju:l]

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n.太空舱；胶囊

a small container with medicine inside which you swallow

The astronauts work and live in the space capsule. 宇航员在航天舱里工作生活。
The doctor advised me to take a capsule this morning. 医生建议我今天早晨服一粒胶囊。