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sterile
mastery UK /ˈstɛɹaɪl/ US /ˈstɛɹəl/adj
card 1 of 10 · fill in the blank
The hospital staff use special covers to keep all the surgical instruments _____ before operations.
card 1 of 10 · fill in the blank
The hospital staff use special covers to keep all the surgical instruments _____ before operations.