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Biasing experts have to place their operations within the bounds of fine techniques爆破专家必须以精湛的技术从事爆破作业
Bricks have to be fird in a kiln for at least two days砖在窑里至少要烧两天
Calls for drastic action have bee made within the last decade in order to achieve stabilization of CO₂ levels at around 550 ppm twice the preindustrial era levels过去的十年、为了让二氧化碳在大气中的含量稳定在550 * 10⁻⁶、有人呼吁采取极端的行动
have a precedent to go by有例可查
New abatement technologies based on various catalyst systems have been developed to drastically reduce overall GHG emissions of explosive manufacturers针对不同催化剂系统的减量新技术已经开发出来,以大规模减少炸药厂家温室气体的总体排放
One must have up to data ideas人的思想必须赶上时代
Racks to be blasted in such a case have large masses and,for the same impulse, their velocity and throw distance will be consequently short在这种情况下爆破的岩石块度大、而且由于冲量相同、岩石的速度和抛掷距离结果变小
Since at least the 1900s, explosives manufacturers have routinely measured time to one millionth of a second for determining the detonation rate of explosives至少从19世纪初开始、炸药制造商业已例行测量到炸药起爆速度所用时间为百万分之一秒
Some biology teachers have even undertaken to give lessons to their students by going closer to nature有些生物老师甚至想带学生走进自然上课
Teachers in mountainous areas have to live on insignificant salaries山区教师只能靠微薄的薪水过活
The type and adequacy of the stemming material used and the management of progressive relief during detonation have a strong influence on the amount of material thrown into the air and hence the proportion of dust likely to be emit ted from a blast爆破中所用的炮泥类型和分量以及对阶梯地形的处理、会大大地影响抛向空中的物质的多寡、因此也大大地影响一次爆破中可能喷出的飞尘比例
They have successfully adopted ultrasonic technology to drive away fish, which effectively avoided the impact of blasting on such valuable fish and other aquatic organisms, thus reflecting the harmony of engineering construction and ecological protection他们成功地采用了超声波技术把鱼赶走、有效避免爆破对珍贵鱼类和其他水生物的不利影响、因而体现了工程建设与生态保护的和谐