Definition: a point in time Level: B1
在那一刻，他意识到自己犯了个大错。
At that ___moment, he realized he had made a huge mistake.
在那一刻，灯突然熄灭了。
At that ___moment, the lights suddenly went out.
就在那一刻，门铃响了。
At that ___moment, the doorbell rang.
