一价

A soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands.

一种软质、银白色、放射性四价金属元素，同位素用作核反应能源，见于钍矿和独居石沙中。

A white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite.

一种白色三价金属元素，有时归为稀土属，见于斯堪的纳维亚钪钇石中。

Because our country in present and a next long time, the coal resource is scarce, the transportation condition is intense, the coal price top digit movement, the coal electricity contradictory prominent pattern will not have big change this basic situation.

由于我国在目前和今后一个较长的时期内，煤炭资源紧缺，运输状况紧张，煤价高位运行，煤电矛盾突出的格局不会有大的变化这一基本情况。

The second half of the year fruit market price whole slides, particularly the citrus fruits granulated sugar orange and the navel orange price is horrible to look, the majority of fruit farmer initial capital not turns over to, but the red meat honey pomelo actually top digit sale, has the judgment fruit farmer, aims at this quite development potential the new variety.

开春以来，平和锦盛红肉蜜柚苗价高热销，来自南方各省的种植户抢购红肉蜜柚苗木成为今年苗木市场的新亮点。08下半年水果市场价格整体下滑，尤其是柑橘沙糖桔及脐橙的价格更是惨不忍睹，大部分果农血本无归，而红肉蜜柚却高位销售，有眼光的果农，瞄准这一相当发展潜力的新品种。

An element bonding parameter topological index HLA is proposed based on topological principle and valence shell electron structural character.

基于元素键参数拓扑指数原理以及镧系元素价层电子结构特征构建了一种新的拓扑指数HLA。

Based on the introduction of quantum numbers and bonding parameters,a novel molecular topological index ~A~was suggested.

通过引入量子数、键参数，认为分子的性质与其中各原子的电负性、价电子数、成键电子数、价层主量子数及各化学键的键长有关，提出了一种新的分子拓扑指数mAY。

One such crystal is the ruby, which contains trivalent chromium ions dispersed in a matrix of alumina

这样的晶体有一种叫"红宝石"，它包含的三价铬离子弥散在氧化铝的基体中。

A process for trivalent chromium electroplating in sulphate system was established.

开发了一种硫酸盐体系三价铬电镀铬工艺，确定了其所使用的阳极，并将所获得的产品相关性能参数与国外同类产品进行了对比。

Trivalent metallic element of the rare earth group.

稀土属的三价金属元素，一种可延展的银白色铁磁体。

Any of various salts containing the negative trivalent radical Fe6and used in making blue pigments.

一种比较近代的、人们好采用的技术是在混合过程中加入可溶性的三价锑衍生物。

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。