单词lack-luster
When a phone has been out for a while, it can start to look a little lack luster.
当一款手机上市一段时间以后，它就会开始慢慢失去光泽。
Without establishing buy-in from those at implementation level, the project may be lack luster.
如果没有获得那些执行层面人员的认可，项目可能会暗然失色。
Coffeine is diuretic, can make the body dehydrates , because dehydrate, cause the skin and lack luster.
咖啡因是利尿剂，会使身体失水，导致皮肤因失水而缺少光泽。