完善制度的英文

the system is being completed gradually

Uphold and improve the basic economic system例句坚持和完善基本经济制度，深化国有资产管理体制改革。Stick to and improve the basic economic system and deepen the reform of the state property management system.

完善的体系制度 well-established system比较完善的体系 a relative perfect system一个没有瑕疵的体系 an impeccable system其实还是用 perfect比较好

free toilet，washroom

reinforce enhance improve strengthen consummate这些都可以，perfect也是对的,很地道