unofficialadj.非官方的;非正式的
UNOnum.(意大利语)一uno.n.联合国组织(=United Nations Organization)
unobtrusivelyadv.不引人注目地;不突出地
unobtrusive survey初步登记;低调进行的登记
unobtrusive measure不受察觉量度
Unobtrusive Research非介入性研究
unobtrusively perceptive and sympathetic.谨慎的、有理解力和同情心。
"a quiet, unobtrusive life of self-denial"