Two distinct domains: (1)
保育员 (bǎoyùyuán) is a kindergarten/nursery childcare worker, distinct from a
教师 (teacher); (2)
保育 in conservation contexts —
物种保育 (species conservation),
文化保育 (heritage preservation) — is more common in Taiwan/Hong Kong; mainland China often uses
保护 (bǎohù) instead.