Her knuckles whiten as she clenches her hands harder.她的手握得越来越紧，指节都变白了。I must whiten my tennis shoes.我得把我的网球鞋刷白.Use: Used to wash, condense and whiten the pulp.用途: 适应于浆料的洗涤 、 浓缩和漂白....
These days, we are bombarded with endless junk mail, fliers, and general bumf.如今我们不得不面对铺天盖地的垃圾邮件、广告传单和无用的公文。The first fliers went aloft in balloons.最早的飞行员乘坐气球升向空中.And shift workers and frequent fliers can develop a circa...
Microlithography processes : Study the interaction between photoresists and exposure light. Application: microlithoghy.(二)微显影制程: 研究光阻与曝光光源的作用. 应用: 微显影....