sack
swollen
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cyst
他 的 背 上 长 了 一 个 囊肿。
He has a cyst on his back.
这 个 囊肿 让 我 感到 不 舒服。
This cyst makes me feel uncomfortable.
医生 建议 我 检查 这 个 囊肿。
The doctor advised me to check this cyst.