micro-activity

例句：

1. 1. Researchers have identified several micro-activities that can enhance learning outcomes.
   研究人员已经识别出几种可以提升学习成果的微活动。
2. 2. The study focused on the micro-activities of students during their first year in college.
   该研究专注于大学生第一年的学习微活动。
3. 3.Micro-activities are often used to engage learners and promote active learning.
   微活动通常用于吸引学习者并促进主动学习。