special system of point-group specialsystemofpoint-group
Related Translations:
特殊: special; particular; peculiar; exceptional 短语和例子特殊儿童 exceptional child; 特殊教育 special education; 特殊情况 special circumstances; special case; 受到特殊照顾 receive special care; 特殊政策, 灵活措施 special po