手术室保持着严格的无菌状态。

The operating room maintains strict ___sterility.

医生检查后确认了他们不育。

The doctor confirmed their ___sterility after the examination.

这个演讲充满了空洞的说教，明显缺乏实质内容。

The speech was full of empty preaching, marked by an obvious ___sterility.