自然界的

All are radioactive heavy metals; and only the first four (actinium, thorium, protactinium, and uranium) occur in nature in appreciable quantities. The other 11 are unstable and are produced only artificially.

这些元素都是具有放射性的重金属；仅前四个元素是在自然界中存在的，其余十一个都不稳定且均为人造的。

The origin of the almighty dollar is in what is now the Czech Republic.

经济生活中的斑斓色彩颜色是在自然界中最灿烂的表象，颜色词是一条贯穿语言王国的彩虹。

Glycosides of arabinose distribute widely in nature and most of them is biologically active.

阿拉伯糖苷类化合物广泛存在于自然界中，是许多药物的有效成分，具有生物活性，如盾叶鬼臼素A，具有强烈的抗肿瘤活性，阿拉伯糖氧苷是阿拉伯呋喃糖酶的重要底物。

In nature, the production of secondary metabolites such as antibiotics by microorganisms increases as a response to biotic and abiotic stress.

在自然界中，次生代谢产物的微生物，如抗生素生产的增加作为对生物和非生物胁迫的反应。

"Rare in nature, olefins are obtained by the cracking of petroleum fractions at high temperatures. The simplest ones (ethylene, propylene, butylene, butadiene, and isoprene) are the basis of the petrochemical s industry."

烯烃在自然界很稀少，但在石油裂解成汽油过程中可大量生成，低级的单烯烃已成为庞大的石油化学工业的基础。

"Rare in nature, olefins are obtained by the cracking of petroleum fraction s at high temperatures. The simplest ones (ethylene, propylene, butylene, butadiene, and isoprene) are the basis of the petrochemicals industry."

烯烃在自然界很稀少，但在石油裂解成汽油过程中可大量生成，低级的单烯烃已成为庞大的石油化学工业的基础。

"Rare in nature, olefins are obtained by the cracking of petroleum fractions at high temperatures. The simplest ones (ethylene, propylene, butylene, butadiene, and isoprene) are the basis of the petrochemicals industry."

烯烃在自然界很稀少，但在石油裂解成汽油过程中可大量生成，低级的单烯烃已成为庞大的石油化学工业的基础。

Plastic is made from lime which can be obtained from the calcination of limestone widely present in nature.

塑料是由是煅烧自然界中广泛存在的石灰石得来的石灰制成的。

Many female birds do not share the same brightly colored plumage as the male of the species. The female Cassowary, on the other hand, does and is stronger and bigger than the male.

自然界中许多雄鸟的羽毛都比雌鸟来的漂亮，鹤鸵却恰恰相反，雌鹤鸵的羽毛更为丰满光艳。

Can not be scratched Quartz that its quartz content is up to 93%, quartz crystal is a natural second only to diamonds in hardness, natural minerals, the surface hardness of Mohs' scale of hardness 7.5, is much larger than the kitchen knife used in the shovel and other weapon, will not be scratched injury.

石英石其石英含量高达93%，石英晶体是自然界中硬度仅次于钻石的天然矿产，其表面硬度可高达莫氏硬度7.5，远大于厨房中所使用的刀铲等利器，不会被其刮伤。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。