It is usually good practice to cull the poorest prior to field planting.通常在实践上的好方法是在出圃栽植前挑出最弱的苗木.To save remaining herds and habitat, the national parks department is planning to cull 2000 elephants.为挽救现存兽群和它们的栖息地，国家公园部计...
她帮我给地板打蜡时我们谈了很久。We'd have long talks while she helped me wax the floor.我们在给汽车打蜡前必须先冲冲车.We hosed down the car before we waxed it.我给靴子打蜡主要是为了防水.I wax my boots chiefly to waterproof them....
通过引入状态变换, 得到了一类降阶形式的状态估计问题.By introducing state transformation, a reduced - order state estimation form is achieved.介绍了异步电动机全阶数学模型的线性化和降阶的原理,并探讨了降阶模型的准确性问题.The accuracy of the linearized reduced order of induction motors...
从而对人类全面认识原子的自电离过程具有重要学术价值.The above achievements have important academic values for enhancing the knowledge about atomic autoionization process.介绍了一种可调谐激光三步孤立实激发方式测量外电场中原子自电离态光谱的技术.We present a isolated core excitation m...