back ground – phrases

Sujet	Anglais	Langues chinoises
élim.	An increase in air temperature causes an increase in the speed of sound, which means that in these conditions airblast emissions can be focused back toward the ground by atmospheric refraction	大气温度的增高、促使声速增加、这是说在这些条件下、大气折射可将冲击波挡回到地面
techn.	back ground	远景
industr.	back ground	纺织品底色
industr.	back ground	背景
aviat.	back ground	本底
arch.	back ground effect	背景效果
intell.	back ground noise	背景噪声
électr.	back ground printing	后台打印
écon.	back-ground	背景
électr.	back-ground pagination	后台分页
math.	forward-ground and back-ground	前台与后台
agric.	hand on back ground	工作经验