Qpo
拟周期振荡
🗣️ 情景例句
Oh, I date occasionally,
哦 ，我偶尔约约会。
The tour will take about an hour and a half. We ought to be back here by 3:00.
参观大概要一个半小时，3点钟以前回到这里。
Tazieff was able to set up his camp very close to the volcano while it was erupting violently.
当火山正在猛烈地喷发时，塔捷耶夫有办法把帐篷搭在离它非常近的地方。