We are not overly concerned with this ‘disappointing’ number

Shows confidence without being overly arrogant.“有充足的自信而又不会让人觉得傲慢.”这个怎么是副词

英语反句子结构分析
It might be tempting to think that an overly diverfied academic community would impede communication among students and faculty.Howevere,in my view any such concerns are unwarranted,especially considering the growing awareness of other peoples and cultures that the mass media,and especially considering the Internet,have created.
意思大概知道,但是这句的句子结构是怎么回事啊

107102：the soil is deep,red volcanic clay,not only overly endowed with nutrients.
想知本句翻译及语言点：
1_the soil is deep,red volcanic clay,not only overly endowed with nutrients：
翻译：土壤是深厚的，红色的火山粘土。
1.the soil is deep,red volcanic clay：土壤是深厚的，红色的火山粘土。不仅丰富地赋有营养物质。
volcanic：adj.火山的
deep：这里是：“深厚的”意思
adj.1.深的2.位于深处的,纵深的3.深色的,浓重的4.声音低沉的5.强烈的,极度的,深厚的6.严重的,深厚的
red volcanic clay：红色的火山粘土
2.not only overly endowed with nutrients：不仅丰富地赋有营养物质
not only ：不仅
endow with：这里是赋有，具有，拥有的意思
1.把…捐赠给(某人或某处) give (sb or sth) a lasting gift of
2.赋予…(天资、美德等)
endow：vt.捐钱,捐赠,资助，赋予
overly：adv.过度地，丰富地
nutrient：
n.(食品或化学品)营养素；营养物,营养品
adj.营养物的,营养品的