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- Because of a long drought, the farmers are doubtful about the prospect of a good yield. 因为长时间的干旱，农民们对于好收成的前景是怀疑的。
- Control product quality and keep production with good yield. 控制生产质量并保持生产稳定。
- Nitrogen manuring is essential to get a good yield of cut herbage. 为了获得刈割牧草良好的产量，使用氮肥是极为重要的。
- You must farm scientifically if you want to have a good yield. 如果你想得到好收成,就得用科学方法种田。
- A variety of cyclopropanes are thus produced in good yield. 从而以高收率得到带各种取代基的环丙烷。
- The county has continued planting both crops and obtained good yields. 这个县继续种植这两种作物，并取得了好收成。
- Of a long drought, the farmers are doubtful about the prospect of a good yield. 因为长时间的干旱,农民们对于好收成的前景是怀疑的。
- First a strain with high lysine content is crossed with one having good yield characteristic. 首先把一个赖氨酸含量高的品系与一个具有丰产特性的品系相杂交。
- Microcrystalline cellulose(MCC) was prepared in good yield(94.6%) from the wood of Cunninghamia lanceolata. 以杉木木材为原料 ,经过制取纤维素和稀酸水解 ,制备了微晶纤维素 (MCC)。
- Abstract: Potassium permanganate supported on alumina could be used for the oxidation of methylpyridine in good yield. 摘要： 以附载型的高锰酸钾/三氧化二铝为氧化催化剂对甲基吡啶氧化有着很高的转化率。
- Good yield of the pure monomer bis(2-hydroxyethylene terephthalate) (BHET) was obtained. 此路线可以以良好的收率得到提纯的单体双(2-羟基乙酸)对苯二甲酸二酯（bhet）。
- The synthesis was accomplished via acylation, Fries rearrangement reaction, chloromethylation and cyanation, and a good yield (88.5%) was obtained. 通过酰基化、Fries重排、氯甲基化和氰化合成2 -羟基 - 3-氰甲基 - 5 -甲基苯乙酮 ;获得了满意的收率 ( 88.;5%25 )。
- This paper indroduced the synthesis methed of norfloxacin by borane compound.The product had high quality and good yield(62 %). 介绍了硼螯化合物合成诺氟沙星的方法,收率高(总收率62%25以上)。
- This paper describes,a number of 2.5-diyne alcohols and 2,5,8-triyne alcohols synthesized by the cptimum reaction condition in good yield. 在最佳反应条件下;作者合成了一系列2.;5-二炔醇和2
- That year good yields of mixed cropping of wheat and peas were obtained. 这一年小麦豌豆间种获得了高产。
- RESULTS:The overall yield was 45.9%,meanwhile,two flavanones:hesperitin 2 and eriodictyol 3,were prepared in good yield. 结果：三步总收率为45.;9%25，同时还以较好收率合成了双氢黄酮化合物：橙皮素2和圣草酚3。
- The simple, economical and environmentally benign oxidation of sulfides to sulfones and sulfoxides in good yield was achieved by using 30%. 在30%25双氧水-乙酸体系中,严格控制反应温度可使3-甲硫基-4-乙氧羰基-5-氨基吡唑氧化成单一的3-甲砜基-4-乙氧羰基-5-氨基吡唑或3-甲亚砜基-4-乙氧羰基-5-氨基吡唑。
- Under the optimized conditions, the cycloadduct wasobtained in good yield (76%) with excellent enantioseletivity (93%ee) in thepresence of 5 mol% chiral Ti complex. 在优化的反应条件下,采用 5 mol%25的手性钛席夫碱络合物催化 Brassard二烯与苯甲醛的不对称 Hetero-Diels-Alder 反应,产率达 76%25,对映选择性达 93%25ee。
- Dimethyl 6,7 methylenedioxyquinoline was prepared from piperonal with good yield(74.6%).The synthetic route consists of nitration, reduction and condensation. 以胡椒醛为原料;经硝化;还原;缩合;制备了标题化合物;产率74.;6
