improving acuity of vision

例句：

1. 1. The companyis improving its efficiency by introducing new technology.
   该公司正在通过引入新技术来提高其效率。
2. 2. The teacher is improving her skills bytaking more classes.
   老师正在通过上更多的课来提高她的技能。
3. 3. Theeconomy is improving, andpeople are feeling better about theirfutures.
   经济正在改善，人们对他们的未来感到更加乐观。