gradual case analysis

例句：

1. 1. The weather is gradually warming up.
   天气正在逐渐变暖。
2. 2.We will gradually improve our skills as we progress through the course.
   随着我们课程的进展，我们将逐渐提高我们的技能。
3. 3.The company plans to gradually increase its workforce over the next few years.
   该公司计划在未来几年内逐步增加其员工人数。