完全一致;是…的一部分
(be) at one (with sb / sth)
to feel that you completely agree with sb / sth, or that you are part of sth
a place where you can feel at one with nature一个能让你感到与大自然融为一体的地方
释义来自《牛津高阶英汉双解词典》第 9 版