YPG Yuma Proving Ground 尤马试验场
YPSCE Young People's Society of Christian Endeavo(u)r [宗]基督教青年励志会
YRA Yacht Racing Association 帆船比赛协会
YS yield strength 屈服强度
YSO young stellar object [天]幼星体
YVA Yangtze Valley Athority 长江流域管理机构
YAS Yard Surcharges 码头附加费
YWSYLS you win some, you lose some 有得有失
YOYO you’re on your own 你得靠自己了
YMMV your mileage may vary 你的消费量可能不一样
YHM you have mail 你有信
YHGMTPOTG you have greatly misinterpreted the purpose of this group 你太过扭曲人家的意思
yhbw you have been warned 早就警告过你了