There is no doubt that time is very limited,even a minute is of great value.这句话中（见补充）

There is no doubt that time is very limited,even a minute is of great value.这句话中（见补充）
答案说这句话是正确的,可是even不可以当连词,那么为什么在even前面不加and之类的连词呢?所以我觉得这句话是错的啊,求解