Definition
starting from a particular point in the past and continuing indefinitely.
从那时开始。
After that incident, he felt anxious around crowds from then on.
那次事件之后，他从那时开始在人群中感到焦虑。
They moved here in 2010 and have lived in this city from then on.
他们于2010年搬到这里，从那时开始就住在这座城市。
Since he started exercising regularly, his health has significantly improved from then on.
自从他开始定期锻炼后，他的健康从那时开始显著改善。