Bialternant
[數]雙交替式
??? 情景例句
Do it for Robbie, Dad.
爸爸 ，給Robbie示范示范。
Once an opportunity slips away, it is gone for good.
機會一旦錯過，永遠不會再來。
It was as clear as daylight then that burglars had forced an entry during her absence.
事情很清楚，在她外出時，竊賊曾闖進家門。