经过数小时的擦洗，厨房变得一尘不染。

After hours of scrubbing, the kitchen was ___spotless.

这家酒店以其一尘不染的亚麻布制品和无可挑剔的服务为傲。

The hotel prides itself on its ___spotless linen and impeccable service.

实验室设备必须保持绝对洁净，以避免污染。

The laboratory equipment must be kept ___spotless to avoid contamination.