occasionally

I occasionally get mild headaches when I spend too many hours staring at a computer screen.

(Chinese) 当我盯着电脑屏幕太久时，偶尔会感到轻微头痛。

We occasionally go out to an expensive restaurant to celebrate a special family achievement.

(Chinese) 我们偶尔会去昂贵的餐厅吃饭，庆祝家庭取得的特别成就。