Museum visitors are invited to use the golden toilet, when the need arises.

邀请博物馆参观者在需要时使用金色马桶。

In that case, since I live in a small town, I do basic dental work, but also act as a periodontist, oral surgeon, and orthodontist when the need arises.

Sadie：在那种情况下， 因为我住在一个小镇，我做基本的牙科工作， 但在需要时也会担任牙周病医生、口腔外科医生和牙齿矫正医生。