nonylene壬烯nonadv.[拉]非；不是non-quenchod and tempered steel非调质钢nonparaxial propoagation equation非傍轴传输方程noncontact longitudinal recording无触点纵向记录Non Real-Time Variable Bit Rate非实时可变比特率nonrandom comparison group method非随机比较分组法non-slip wire-drawing machine无滑动拉丝机non-heat preservation quenching无保温淬火non-classical photon statistics非经典统计non-procedure oriented language非程序定向语言non-linear consolidation theory非线性因结理论

1. Already the sales of durable goods had begun to fall off.
   耐用物品的销售量开始下降。