查询词典 four-fold

The field investigation indicates that there are four phases of development of carbonate breccia wedge of LST, which reflects that this area experienced at least four times of significant sea level changes in the Early-Middle Triassic.

野外调查发现研究区共发育4期低水位期碳酸盐岩角砾岩楔，说明该区在早－中三叠世至少经历了4次明显的海平面变化。

The scales of "Sorbonne","Mera star","Siberia","Tiber" were used to study systematically soilless cutting skills of Oriental lily from pretreatment of scales, cutting medium to nutrition solution. The results indicated:① using broken dormancy bulbs which experienced disinfection and exposing could prevent it from rot and enhance propagation index;② There is no difference among four varieties on information of bulblet, so all four varieties can be propagated bulbs though cutting.

本试验以东方百合索蚌、残星、西伯利亚、泰伯四个品种的鳞片为材料，分别从鳞片的预处理、扦插或催芽基质的筛选、20—22℃室温下催芽、营养液选配等几方面对东方百合无土扦插的技术措施作以系统研究，结果表明：①用打破休眠的种球，并通过破球、消毒、晾晒处理，有效的防止了扦插过程中鳞片的腐烂，提高了繁殖系数；②东方百合鳞片也有扦插分生小子球的潜能，四个品种之间分生子球的差异不显著，因此它们都可以用扦插方法繁殖种球。

Currently 14 existing products, according to campaign is divided into four categories: one category is phosphorus chemical series, to yellow phosphorus, phosphoric acid, sodium tripolyphosphate-based, phosphoric acid, sodium tripolyphosphate of the 50,000 tons / Year; second category is the chlor-alkali series, caustic soda, hydrochloric acid, liquid chlorine, hydrazine hydrate, polyethylene butyral mainly three types of products is manganese, manganese powder, manganese ingots, mainly Electrolytic Manganese, One Electrolytic Manganese annual production capacity of 10,000 tons, manganese ingot processing capacity 15,000 tons / year; four other products, including oxygen, acetylene, such as selenium dioxide.

目前现有产品14个，按系列分为四大类：一类是磷化工系列，以黄磷、磷酸、三聚磷酸钠为主，其中磷酸、三聚磷酸钠各5万吨／年；二类是氯碱系列，以烧碱、盐酸、液氯、水合肼、聚乙烯缩丁醛为主；三类是锰产品系列，以锰粉、锰锭、电解锰为主，其中电解锰年生产能力为1万吨，锰锭加工能力1.5万吨／年；四类是其他产品包括氧气、乙炔、二氧化硒等。

This is due to a braking system that assures fast, gradual braking and also shorter stopping distances; ventilated front discs with a diameter of 330 millimetres with Brembo fixed aluminium callipers with four pistons (38 and 42 mm)- and an ABS system with four active sensors complete with an EBD electronic brakeforce distributor.

这是由于刹车系统，保证快速，并逐渐缩短刹车制动距离，通风的330与Brembo四活塞（38和42毫米）- ABS系统和固定铝制卡钳毫米直径的前制动盘4活跃传感器在开机片电子制动力分销商完成。

In former times, those severe places where the discipline of the prison delivers the convict into his own hands, were composed of four stone walls, a stone ceiling, a flagged pavement, a camp bed, a grated window, and a door lined with iron, and were called dungeons; but the dungeon was judged to be too terrible; nowadays they are composed of an iron door, a grated window, a camp bed, a flagged pavement, four stone walls, and a stone ceiling, and are called chambers of punishment.

从前，狱里的制度是让囚犯自己去处理自己的，囚禁他们的那种严酷的地方，四堵墙是条石砌的，顶上也是条石架的，地上铺了石板，放一张布榻，有一个用铁条拦住的透风洞，一道钉上铁皮的门，这种地方叫做囚牢，但是有人认为囚牢太可怕了。

In order to decolorize the polysaccharide from Cardamine enshiensis ,the hydrogen peroxide was used to be reagent for decolorizing the polysaccharide,and the time,temperature,pH as well as the concentration of hydrogen peroxide were selected to be factors for the experiment of single factor,then the orthogonal test with four factors and four levels was carried out on the aforementioned basis.

为了脱除碎米荠多糖液中的色素，以过氧化氢(H2O2)为脱色剂，选择脱色时间、脱色温度、pH值和过氧化氢的质量百分比浓度等因素为试验因素，进行单因素试验，以此为基础进行4因素4水平的正交试验。

The article for studying room is the total name to the modern artifacts for the office and of the traditional studying four treasures(writing brush, ink, paper, inkstone), including: the four treasures and penholder, writing brush hanger, inkstones holder,seal,ink paste used for seals, inkstone-box, cardcase, memo boxe, notebooks, etc.

文房用品是对文房四宝在内的传统器物和现代办公文仪的总称，包括：笔、墨、纸、砚在内，还有笔筒、笔架、水盂、水洗、宫绢、镇纸、臂搁、砚匣、印章、印泥、名片盒、便笺盒、笔记本等等。

Carl Lewis, an American, is one of the only four Olympic athletes to win nine gold medals and one of the only three to win the same individual event four times.

美国运动员卡尔-刘易斯是四名赢得9枚奥运会金牌的运动员之一，也是三名四次赢得同一单项奥运冠军的运动员之一。

Four sorts of sex pheromones that were mixed at different ratios with three kinds of main sex pheromone components of seabuckthorn carpenter moth:-7-tetradecenyl acetate (Z7-14:Ac),-3-tetradecenyl acetate (E3-14:Ac) and-7-tetradecenyl acetate (E7-14:Ac), were experimented in the field. The results showed that four kinds of pheromones all had strong, attractive effects on male moths.

为比较沙棘木蠹蛾性信息素不同配方的诱集效果，该文利用人工合成的性信息素组分顺-7-十四碳烯乙酸酯(Z7-14：Ac)、反-3-十四碳烯乙酸酯(E3-14：Ac)和反-7-十四碳烯乙酸酯(E7-14：Ac)按照不同比例配置的4种配方进行了野外诱集试验。

In this thesis, we gives a novel graphical representation of DNA sequences by taking four special vectors in 2-D Cartesian coordinate system to represent the four nucleic acid bases in DNA sequences, so that a DNA sequence is denoted on a plane by a directed walk.

由于在DNA计算中，信息总是通过特定长度的DNA序列来表示的，因此，选择高质量的方式来表示DNA序列就成为一个重要的问题。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。