四倍

Autotetraploid rice IR36-4X was treated with ion implantation of low energy nitrogen ion beams and a polyembryonic seedling mutant IR36-Shuang was identified in M2 generation.

以低能氮离子束为诱变源，对同源四倍体水稻品系&IR36-4X&进行离子注入，在其第2代群体内筛选得到了1株具有多胚苗性状特征的突变株（IR36-双）。

In the present study, the autotetraploid rice IR36-4X was treated with ion implantation technique by nitrogen ion beams and a polyembryonic seedling mutant (named as the IR36-Shuang) was identified in M2 generation. The mutant line was systematically investigated about the location of seedling in polyembryonic seedling, and the cytological initiation of the additional embryo in the 1R36-Shuang was observed and determined.

以低能氮离子束为诱变源，通过对同源四倍体水稻品系&IR36-4X&进行离子注入后在其第2代群体内筛选得到了1株具有多胚苗性状特征的突变株（IR36-双），对该突变株后代的多胚苗形态特征及其多胚来源进行了研究。

Objective To establish a tissue culture system of Pueraria thomsonii and to cultivate a new breed autotetraploid.

目的建立粉葛的组织培养体系；培育粉葛同源四倍体新种质。

Theywere charged with pyroxyle, taking into consideration its explosive power,which, as has been said, is four times that of ordinary powder: theprojectile to be fired was cylindroconic.

前面已经说过，棉花火药的爆炸威力相当于普通火药的四倍，他们考虑到这一点，然后给大炮装上适当量的棉花火药。炮弹是圆锥筒形的。

"Pattern of this kind of trade is in the United States extraordinary success, everybody dare ignore this kind of mode so, although 9 get the turnover that shows level not tall, but we have 3 every year to arrive to grow quadruply, do after 3 years two big."

&这种商业模式在美国非常成功，所以谁也不敢忽视这种模式，虽然九钻现阶段的营业额不高，但我们每年有三到四倍增长，两三年后就做大了。&

Generally, the amount of coal fly ash is four times of coal bottom ash, therefore, it needs more techniques to reutilize.

煤灰可分为底灰及飞灰二大类，其中飞灰产量约为底灰的四倍，因此需更积极寻求飞灰多方面之用途，以提升飞灰之利用量。

Chromosome observation of the male sterile line and fertile line, parents of hybrid combination and F1 indicated that the chromosome number of the male sterile line is the same as that of fertile line 2n=2x=24; Pollen parent (Tagetes putula PHBO029) is tetraploid 2n=4x=48; the F1 is triploid 2n=3x=36 with hybrid vigor.

通过对不育系、正常可育系以及杂交组合父母本、子一代的染色体数目观察发现：万寿菊雄性不育系的染色体数目与正常可育系相同，均为2n=2x=24；孔雀草PHBO029为四倍体2n=4x=48，它与万寿菊不育系杂交、其杂种为具有杂种优势的三倍体2n=3x=36。

For example,α2-macroglobulin appears to have an alternative structure that consists of a tetrameric subunit linked via disulfide bridges.

例如，第二号甲型巨型球蛋白似乎拥有一个由双硫键所连结的四倍体次单元所组成的结构。

Meanwhile, by either artificial chromosome doubling via colchicine treatment or spontaneous chromosome doubling via a union of unreduced gametes (2n) from T. turgidum-Ae.

同时，通过秋水仙碱对四倍体小麦-节节麦杂种进行染色体人工加倍或利用未减数配子自然加倍，我国科学家创制了一些新的人工合成小麦。

The Sapphire TOXIC X1900 XTX wasat 2X Quality ADAA and the 7900 GX2 at 4X TR SSAA.

蓝宝石有毒x1900xtx在总产值菌质量和七千九百许可在四倍体换回ssaa。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。