... day alternates with night 昼夜交替 day and night clinic日夜诊所 day and night distress signal 日夜遇险信号 ...
权威例句
1.
"Every man, woman and child who came to his clinic over the next 30 days were treated dayandnight, " Stachel said.
CNN: Lighting the way for safe childbirth
2.
During the rebellion, he said, he had treated Col Gaddafi's soldiers during the day at a clinic in central Tripoli, and then slipped out at night to help rebel casualties in the city.