四体

American English was mainly formed and developed in the colonial and the initial post-independence period.

用现代语言学的术语来说，美国英语是英语的一种变体，是近四百年来英语使用于北美这个特殊的地理环境，受美国社会文化影响而形成的一种变体。

The present paper compared the major storage proteins in starchy endosperm of four autotetraploid rice lines with that of their corresponding diploid rice lines. The content of albumin, globulin, prolamin and glutelin in each sample was determined respectively.

以4份同源四倍体水稻和4份相应的二倍体水稻为研究材料，对其种子内清、球蛋白、醇溶蛋白和谷蛋白的含量进行了测定，利用聚丙烯酰胺凝胶电泳技术分析了其特异性。

Shakespeare was a master of many poetic forms: the song, the sonnet, the couplet, the quatrain, the blank verse.

莎士比亚是多种诗歌形式的大师：歌曲、十四行诗、双行联韵体、四行诗、素体诗。

The error model identification of accelerometers on a azimuth strapdown platform system is also concerned in the dissertation. The composite 14 position test plan of the regular hexahedron and octahedron is provided, and identification results are obtained by using improved progressive regression algorithm.

本文实验研究了方位捷联平台系统加速度计误差模型辨识方法，根据最优试验设计理论设计了正六面体和正八面体组合十四位置试验计划，并用改进的逐步回归算法给出了辨识结果。

It is mainly used to control the second-generation schizont of coccidis with the activity peak to coccidis on the forth day.

尼卡巴嗪主要作用于球虫第二代裂殖体，对鸡虫的活性高峰期为第四天，即对第二代裂殖体活性最强。

The target strength term R〓 in A-T model is derived based on the quasi-static spherically symmetric cavity expansion theory.

四。基于静态球形空腔膨胀理论，考虑脆性材料在高速冲击作用下的破碎，求出了空腔膨胀压力，即靶体阻力R〓，为合理确定修正的流体动力学理论模型中靶体强度参数提供了合理的方法，求出的侵彻深度与试验结果符合较好。

But detail geochemical study indicates (Wu et al., 2002)that those rocks have low Sr〓(0.706), high ε〓(-0.5～-1.9), young age of Nd model age (970-1090Ma) and syngenesis with surrounding I-type granites. The rock originated from partial melting of source igneous rock and belongs to I type granites. The occurrence of high alumina minerals is related to the intense interaction of magma and liquid during the late period of magma evolution, and tetrad REE patterns are formed.

但详细的地球化学研究表明(Wu et al。，2002)，岩体具有低的Sr〓(0.706)、高ε〓(-0.5～-1.9)、年轻的Nd模式年龄(970-1090Ma)及与周围Ⅰ型花岗岩的共生关系，认为岩体是火成岩源岩物质部分熔融的产物，属于Ⅰ型花岗岩，高铝矿物的出现与岩浆演化晚期强烈的岩浆—流体相互作用有关，并形成特征的稀土元素四分组效应。

There are tetraploid and diploid regenerated plants in "Page tangelo + Valencia orange" and "Hongju tangerine + Rough lemon".

丹西红橘+粗柠檬和佩奇橘柚+伏令夏橙2个组合的再生植株既有二倍体也有四倍体；

The results showed that the caffeic acid content in tetraploidy taraxacum officinale was 0.29%, and in diplontic taraxacam dissectum it was only 0.105%.

二倍体山西多裂蒲公英中咖啡酸含量仅为0.105%，四倍体药蒲公英中咖啡酸含量高达0.29%，比前者多176.1%。

For its homo-dimer or tetrad structure, MDH is regarded as an ideal model for research on oligomeric protein structure and function.

同时，MDH多为同源二聚体或四聚体结构，也可以作为研究寡聚蛋白结构和功能的理想模型蛋白质。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。