to make something right when it was previously incorrect, improper, or defective
纠正, 修正
to examine, repair, and make significant improvements or changes to something
改造, 检修
to make changes or additions to a document, law, contract, or similar text in order to improve, correct, or update it
修改, 修订
to improve a machine, computer system, etc. in terms of efficiency, standards, etc.
升级, 改善
to develop from a simple form to a more complex or sophisticated one over an extended period
进化, 发展
to make something work at its best by improving how it functions or performs
优化, 改善
to make very precise adjustments, usually small ones, to improve or perfect something
微调, 调整
to make something, particularly something unpleasant or unsatisfactory, better or more bearable
改善, 缓解