| 1. | We must find economical methods for extracting oil from shale .
我们必须找到从页岩中采油的经济方法。 |
| 2. | Engineers are forever seeking more economical methods of solving old problems .
工程师们常常探索解决老问题的更加经济的办法。 |
| 3. | More research is needed to develop effective and economical methods for ultimate disposal of concentrated waste materials removed from wastewaters .
要进一步研究从废水中去除的浓缩污泥的有效而经济的最终处理方法。 |
| 4. | This is not an economical method of heating
这不是一种经济的取暖方式。 |
| 5. | Economical method for population
人口经济方法 |
| 6. | Cutting the impeller of pumps is a convenient and economical method for this purpose
切割泵叶轮是简便、经济的方法。 |
| 7. | So we can use the most economical method to make the best quality of water
这样我们可以用最经济的方法使内河水质达到最大的清洁度。 |
| 8. | It is concluded that to decrease the residue stresses in fabrication is an efficient and economical method
通过加强制造过程的管理降低残余应力,是经济有效方法之一。 |
| 9. | In - building power line data communication is a convenient and economical method to implement home automation and home network
室内电力线数据通信是实现家庭自动化和家庭联网的一种方便又经济的通信方法。 |
| 10. | Bonded composite repair has been recognized as an efficient and economical method to extend the service life of damaged aircraft metallic structures
损伤金属飞机结构的复合材料补片胶接修理技术是一项经济而有效的结构延寿方法。 |
