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1·Taproot A persistent primary root that grows vertically downward.

直根：垂直向下生长的宿存主根。

2·The relatively poor level of prodLIctiveforce is the primary root;

我国相对落后的生产力水平是原生层次根源；

3·Acropetal differentiation of the cambium layer continues as the primary root elongates.

形成层的向顶分化像初生根伸长一样在继续进行。

4·When building the primary root system, capability of getting assimilation and elongation pattern of each root are similitude.

随着植株源器官的建成，初生根系各主轴获取同化产物的能力以及伸长模式相似。

5·Primary root resorption is a physiological event for the primary teeth and plays an important role during normal replacement procedure.

乳牙根吸收是一种生理现象，在乳牙的正常替换过程中具有重要意义。

6·In this paper, a theorem of primary root exists as a couple in the Number Theory was suggested, and detailed mathematic proof was given.

首先提出了数论中的原根成对存在定理，并进行了详细的数学证明。

7·According to the function, the wheat roots could be divided into 3 groups: primary root group, lower secondary root group and upper secondary root group.

依照各单位根的功能，小麦根可分为3组：初生根组、次生根下位组和次生根上位组。

8·Taproot a persistent primary root that grows vertically downward. Swollen taproots used for food storage are common in many biennial plants, such as carrot (Daucus carota).

垂直向下生长的宿存主根。两年生的植物常具有可以储存养料的肥大直根，如：胡萝卜。

9·It was demonstrated that the cell cycle indexes were decreased as long as the concentrations of SNP were increased after collecting the cell division phase of the primary root-tip cells;

对SNP处理的水稻初生根根尖细胞进行细胞分裂相统计，结果表明：随SNP浓度的增大，细胞分裂指数呈下降趋势；

10·The levels of endogenous Auxin, Zeatin and Zeatin riboside in the middle segment of primary root were all increased obviously by DPC, which might be the key reason for lateral roots induction.

DPC处理提高了幼苗主根中部生长素、玉米素及其核苷含量，可能是诱导侧根发生的内在原因。