一心一德: wholeheartedly and faithfully; be of one heart and one mind; spirit of solidarity; unite as one; with one heart and one mind; with united will
一体: 1.(关系密切, 如同一个整体) an organic [integral] whole 短语和例子融成一体 merge into an organic whole2.(全体) all people concerned; to a man 短语和例子一体遵照 be observed by all; 一体周知 be known to all