词汇：periodic

adj. 周期的；定期的

相关场景

“Well, he’s mighty fond of that horse,” he said. “And she might kill him yet.” “She ain’t gonna kill the Captain,” Deets said. He had the sad sense that things were not right. It seemed they were going to go north forever, and he couldn’t think why. Life had been orderly and peaceful in Texas. He himself had particularly enjoyed his periodic trips to San Antonio to deposit money. Texas had always been their country, and it was a puzzle to him why they were going to a country that would probably be so wild there wouldn’t even be banks to take money to.

>> Lonesome Dove 孤鸽镇

ELAINE (v.o.) This is due to periodic air pockets we encounter. There is no reason to become alarmed, and we hope you enjoy the rest of your flight. By the way, is there anyone on ­board who knows how to fly a plane?

>> 飞机 Airplane! Movie Script