阶段进展 meaning in Chinese

milestones

The bad : high encounter rate and loading times bog things down ; starts slowly with a lot of running around and not much else
缺点：过高的遇敌率和漫长的读盘时间让人苦陷其中；整天到处跑又没别的事情干让游戏起始阶段进展缓慢。
As a branch of science advances from a descriptive and qualitative stage to one where the relations can be expressed in a quantitative and explanatory manner the science assumes a mathematical form
当一门科学从描述和定性的阶段进展到可以用定量和解释的方法来表达关系的阶段时，该科学就采取数学的形式。