查询词典 alternation

Alternation of generations can be divided into two basic types, one for the same shape alternation of generations, the sporophyte and the gametophyte in the morphology similar size, only cytology and physiology are different, such as Ulva, etc.; another type of shape alternation of generations, that is, in the sporophyte and gametophyte morphology and size are also significant differences.

世代交替又可分为两种基本类型，一为同形世代交替，即孢子体和配子体在形态大小上类似，仅在细胞学上和生理上有所不同，如石莼等；另一类型为异形世代交替，即孢子体和配子体在形态结构和大小上也有明显差异。

Compare diplobiontic. See alternation of generations.

比较 diplobiontic ，参见 alternation of generations。

Compare haplont; alternation of generations.

比较 haplont； alternation of generation 。

See alternation of generations.

参见： alternation of generations

See also alternation of generations.

参见 alternation of generations。

Wracks. See alternation of generations.

墨角藻。参见 alternation of generations。

The present research draws on the research results both in China and abroad, and takes Pinker"s theory on English dative alternation as its frame work, with the help of Goldberg"s Construction Grammar to investigate the L2 acquisition of English dative alternation by Chinese EFL learners.

本学位论文在借鉴国内外有关与格转换研究成果的基础上，以Pinker有关与格转换的理论为依据，结合Goldberg的构式语法，考察了英语作为外语的中国学习者对英语与格转换的二语习得。

The atmospheric transmittance database for l064nm laser is created basing on the FASCODE. The model atmosphere is midlatitude summer. The slant path length covers (0~10) km with the alternation of 0.1km. The elevation covers 0°~91° with the alternation of 5° The surface range covers (5~20) km with the alternation of 1km.

利用FASCODE计算出1064nm激光的大气透过率，建成透过率数据库，该数据库对应的大气模型为中纬度夏季，斜程范围为(0~10)km（间隔0.1km），仰角范围为0°~90°（间隔5°），地面能见度范围为(5~20)km（间隔1km），数据库可以根据需要进行扩展。

Based on an analysis of the mechanism of flow pattern alternation, approximate criterion for flow pattern alternation was formulated, and a numerical model was worked out for simulation of free overfall and submerged overfall alternation by combination of the above two models.

分析两种不同水流形态的交替机理，建立两种水流的转换条件，联立两种不同形态的数学模型构成保水堰的堰流和满流交替的非恒定流数学模型。

The main finding were:(1) the 2;8- year-old children could use novel causative and inchoative verb alternation.(2) the children (from 2;8 to 4;7) were productive in novel causative and inchoative verbs alternation.(3) the 4;7-year-old children uttered periphrastic causative verbs more than the two younger groups.

从实验结果发现(1)二岁八个月的儿童就能使用使动与启动动词交替(2)从二岁八个月至四岁七个月的儿童都能使用使动与启动动词非常好(3)四岁七个月儿童使用冗长使动动词较年纪较小的儿童更频繁(4)肢体是否接触是会影响儿童在使动动词的回答。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。