?假定常模
... arbitrary functional 随意功能性 arbitrary norm 假定常模 arbitrary origin 假定原点 ...
It needs to be an environment where attacks, intimidations, harassments, abductions, arbitrary imprisonments, and threats are the exceptions and not the norm.
UNESCO: World Press Freedom Day 2013
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。