background noise level是什么意思_background noise level的音标_background noise level的发音_background noise level的用法_英语词典_英语网-英语阅读,英语单词,英语语法,英语作文,英语考试,免费的英语学习网站

allowable noise level容许噪声电平;
a level playing field公平竞争的机会;人人机会均等;
background music背景音乐;
background investigationn.背景调查;A reference check on the job candidate that can help verify the true identity of the person and possibly confirm his or her empl;
background heating背景供热;
background check背景核对;
compete on a level playing field在公平的竞争环境中竞争
level with和…一样高;<口>向（某人）说实话;
level up将（收入等）向上拉平;垫平;
level playing field[财]公平竞争环境;
level out at水平出
Level out平坦起来;达到平衡[稳定];消除（差别等）;
level off将…弄平; 使平整;使平稳; 使稳定;
level headn.冷静的头脑;
level crossing平交路口;
level at（用枪）对准[瞄准];将…的矛头指向（某人）;
manned level crossing有警察的平交路口;
noise pollutionn.噪音污染;
on a level withadv.和…相等;齐;
Kirkpatrick's four level model of evaluation柯克帕特里克的四个层次的评价模型