学校最近对图书馆进行了多项改进，增加了更多座位和电脑。

The school recently made several ___improvements to the library, adding more seats and computers.

公园的最新改进包括一个新游乐场和更宽的步行道。

The latest ___improvements in the park include a new playground and wider walking paths.

经过三个月的训练，他的游泳技术有了显著进步。

After three months of training, he made significant ___improvements in his swimming skills.