sub-

表示“在…下面”之义

表示“副的、次的、亚的、附属的、次级的”之义

表示“近乎，几乎”之义

sub-

situated under or beneath

secondary in rank; subordinate

falling short of; less than or imperfectly

forming a subdivision or subordinate part of a whole

indicating that a compound contains a relatively small proportion of a specified element.indicating that a salt is basic salt