Frogging
交叉现象
🗣️ 情景例句
My brother Robbie ...
我弟弟Robbie……
Finished labours are pleasant.
大功告成，好不高兴。
In 1929, three years after his flight over the North Pole, the American explorer, R.E.Byrd, successfully flew over the South Pole for the first time.
美国探险家 R。伯德在飞越北极3年之后，于1929年第一次飞越了南极。