arm's-length英 ['ɑ:mzl'eŋθ] 美 ['ɑ:mzl'eŋθ]正常交易关系One of its key attributes is the arm's-length relationship between government and the trustee museums. 它的一项关键特点，是在政府与受托博物馆之间保持一定的距离。
