mmaterial
adj
1 ~ (to sb) not important; irrelevant 不重要的; 不相干的
The cost is immaterial. 成本微不足道.
It is immaterial (to me) whether he stays or leaves. 他的去留(对我)无所谓.
2 without physical form or substance 非物质的; 非实体的; 无形的
as immaterial as a ghost 虚无如鬼魂.
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.