四倍的

Homozygous tetraploid is a relatively balanced system,the continued selection is invalid.

纯合的四倍体是一个相对平衡的系统，继续选择是无效的。

Apparently, every year he went through the change from one form to the other, but had only recently realized he was tetraploid, and hadn't yet figured out the connection between the two.

/ 显然地，每年他经过从一种形式到另一个的改变，但是只有最近有了解他是四倍体的，而且没有理解之间的连结那二。

Toxicity of chemicals and break or deficiency ofchromosomes could be the important cause of high deathrate in the tetraploidy embryos of abalone.

化学药物的毒性作用和染色体的断裂或缺失，可能是导致皱纹盘鲍四倍体胚胎死亡率高的重要原因。

A report by the Department of Education estimates that the student-teacher ra tio in China is four times higher than in the United States .

教育部的一份报告估计中国的学生和老师的比例比美国高四倍。

If you come to my house, you will find basin of Bambusa Multiplex no longer exist, replaced by the calla lilies, look at her palm leaves have been four times larger.

如果你现在来我家，就会发现那盆凤尾竹已经不在了，取而代之的是海芋，瞧她的叶子已经巴掌的四倍大了。

A report of the education ministry show that the percent of chinese students and taechers is fouth time than american's.

教育部的一份报告估计中国的学生和老师的比例比美国高四倍。

The investigation results show that the shrubs diameter apart from root 50 mm mostly shall not exceed 15mm, such as Caragana Korshinskii Kom, Vitex, Fourfold Acacia, and Grewia biloba var.parviflora. The moisture content of the above shrubs is about 55%, 55%, 61% and 50% separately in late autumn and winter when they are reaped.

通过实地调查研究和统计分析适值收割的柠条等几种常见灌木的距地50 mm左右处的直径一般不超过15 mm，适宜收割期间柠条含水率为55%左右，荆条含水率为55%左右，四倍体刺槐含水率为61%左右，扁担木含水率为50%左右。

According to the order, the data of Caragana Korshinskii Kom is about 6.07 J/cm~2, 23.67 MPa, and 1787.98 MPa separately, and the data of Vitex is about 11.78 J/cm~2, 48.06 MPa and 3544.36 MPa separately. Additionally, the data of Fourfold Acacia is about 10.09 J/cm~2, 40.78 MPa and 2304.87 MPa , whereas the data of Grewia biloba var.parviflora is about 8.47 J/cm~2, 65.88MPa and 2523.88MPa respectively. The impact toughness four shrubs is in the bound of the data of wood in China, but the compressive strength and compression elastic modulus parallel to grain are some small than those of ordinary wood.

柠条的冲击强度为6.07J/cm~2，顺纹抗压强度为23.67MPa，顺纹抗压弹性模量(来源：AB75C论文网www.abclunwen.com)为1787.98MPa；荆条的冲击强度为11.78J/cm~2，顺纹抗压强度为48.06 MPa，顺纹抗压弹性模量为3544.36MPa；四倍体刺槐冲击强度为10.09 J/cm~2，顺纹抗压强度为40.78 MPa，顺纹抗压弹性模量为2304.87 MPa；扁担木的冲击强度为8.47J/cm~2，顺纹抗压强度为65.88MPa，顺纹抗压弹性模量为2523.88 MPa。

I eat almost no junk food. I eat about three or four times as many plant foods as before; probably 50 percent or more of my calories come from nonanimal sources.

我几乎不怎么吃垃圾食品了，我现在吃的素食是以前的三到四倍；差不多50%的热量都是从这些素食中摄取。

Past research showed that cigarette smokers are four times more likely to get pneumococcal diseases than nonsmokers.

过去的研究表明，吸烟者患肺炎的几率是非吸烟者的四倍。

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。