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- Low yield and poor benefit 低产低效
- Phthorimaea heliopa larva harms the tobacco stem, and causes slow growing of plant and dwarf plant with new leaf clustered, resulting in significant low yield and poor quality of tobacco. 了解烟蛀茎蛾的生物学特性及其发生危害与环境的关系，采取农业防治结合使用低残留化学药物，可取得较好的效果。
- The results indicate that, the pellets made from pure Daxigou ore fines are not suitable because of low yield and low decrepitation temperature. 研究结果表明：纯大西沟铁矿粉造球，由于成球性较差，爆裂温度偏低，不利于工业化生产；
- General ways of synthesizing novolac have low yield and produce large quantities of waste water which contain significant amounts of free phenols. 常规热塑性酚醛树脂生产的产率较低,且产生大量高浓度含酚废水,污染环境。
- There are many difficulties using tranditional renaturation methods, including low yield and too many steps which cannot be used in industry. 利用传统的方法复性复性率低和步骤繁琐,无法用于大规模生产。最近出现的层析复性方法,具有较强的优势。
- The synthesis of sodium dodecyl sulfate is the familiar chemical engineering speciality experiment, but the shortcomings are existed in long time, low yield and bad stability. 十二烷基硫酸钠的合成制备是常见的化工专业实验,但存在合成时间长、产率低、产品稳定性差的缺点。
- How can we bridge the gap between rich and poor? 怎样才能缩小贫富之间的差距?
- In view of the domestic styrenes situation such as small production capacity, old technological level, low yield and large imports etc., some suggestions on the development of styrene at home are put forward. 针对我国目前苯乙烯生产能力低，老工艺落后，产量小，进口量大等问题，提出了几点发展建议。
- There is always a vast chasm between rich and poor. 贫富的鸿沟始终存在。
- The major problems such as low recovery ratio of protein,low yield and purity of finished products are found in the process of isolation soy protein by alkali extraction and acid precipitation. 大豆分离蛋白的碱浸提酸沉淀工艺，目前普遍存在成品得率低，纯度低的问题。
- Replanting, heavy pruning and collar pruning are the main reforming methods for low yield and senescent tea plants.Tea as a perennial crop, it is necessary to evaluate these methods in the long run. 摘要改植换种、重修剪和台刈是低产衰老茶园改造最常用的几种方式，茶树作为多年生作物，有必要从较长一个时期来比较各改造方式的优劣。
- Mars is too dry and poor in oxygen. 火星上面过于干燥，并且缺乏氧气。
- He woos both high and low, both rich and poor. 他追起女人来，不论贵贱贫富。
- He woos both high and low,both rich and poor. 他追起女人来，不论贵贱贫富。
- Many of the poor benefit from social programmes. 许多穷人都从社会计划中获益。
- The traditional method (NaCN route) should be improved for its plurality of steps, low yields and pollution problem. 传统的氰化钠法由于流程长,收率低,污染环境而亟待改进。
- I can not just turn my back on him now because he's ill and poor. 现在他贫病交加，我可不能不加理会。
- I can't just turn my back on him now that he's ill and poor. 我不能因为他贫病交迫而背弃他。
- The major problems such as lower recovery ratio of protein, lower yield and purity of finished products existed in the process of isolating soy protein by alkali extraction and acid precipitation. 大豆分离蛋白的碱浸提酸沉淀工艺，目前普遍存在蛋白质回收率低，分离蛋白成品得率低，纯度低的问题。
- Fresh cattle manure got lower yield and it's better to apply as a composted status.There was no short-term restoration effects for alfalfa hey, lentil hey, oat green and wheat straw. 结果表明,猪粪、鸡粪、腐熟牛粪对表土完全损失的土壤生产力恢复效果最好;
