救援队正在夜以继日地工作，以搜寻地震幸存者。

Rescue teams are working ___around ___the ___clock to search for survivors of the earthquake.

不可否认，人们为了谋生正在没日没夜地工作。

It is undeniable that people are working ___around ___the ___clock in order to earn a living.

客户服务热线全天候开放，以处理紧急咨询。

The customer service hotline is available ___around ___the ___clock for urgent inquiries.