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This generally requires a systematic mathematical transformation of the earth's graticule of lines of longitude and latitude onto a plane.

这通常需要在一个在某个平面一个地球丝网的系统的数学的转换。

Precambrian time is now divided into three eons: Hadean, from the earth ' s origin to about 3900 Ma; Archaean, 3900-2390Ma; and Proterozoic, 2390-570 Ma (the Cambrian marks the start of the Phanerozoic eon, which extends to the present day).

现在将前寒武纪分为三个时代；冥古代，从地球诞生到约39亿年前；太古代，39亿年前—23.9亿年前，以及原生代，23.9亿年前—5.7亿年前（寒武纪标志显生代的开始，延续至今）。

Jerrodd felt uplifted, as he always did when he thought that his own personal Microvac was many times more complicated than the ancient and primitive Multivac that had first tamed the Sun, and almost as complicated as Earth's Planetarv AC that had first solved the problem of hyperspatial travel and had made trips to the stars possible.

谢路感到很是兴奋。他每次想到这问题都有同一的感觉∶他现时个人拥有的「微型模」，比起那首次驯服太阳，既古老又原始的「茂的模」，不知复杂多少倍。比起那首次解决了超太空飞行的难题，使星辰间的旅程成为可能的地球「行星模」（历来最大的「行星模」。）其复杂性也不相伯仲。

Keeling discovered very early that CO2 in the Earth's atmosphere cycles daily.

基林很早就发现一天中大气中二氧化碳的浓度是循环的。

Keeling discovered very early that CO2 in the Earth's atmosphere cycles daily.

基林很早就发现每天大气中二氧化碳的含量呈周期性变化。

Keeling discovered very early that CO2 in the Earth's atmosphere cycles daily.

基林很早就发现一天中大气中二氧化碳的含量是周期性的。

This land is the last living remnant of Earth's second Galactic Federation colony, Lemuria.

该大陆是地球的第二个银河联盟殖民地——利莫里亚最后的幸存成员。

Further, on the basis of removing the factors which affect seismic velocity, such as earth′s surface, seismic processing technique and particular lithesome, the comprehensive researches indicate that the east prominent is intimately adjacent to the gas generating sag, and the reservoir bed and capping bed arrangement condition is very good. The east prominent has the feature of late gas accumulation and has the petroleum geology conditions of forming large scale natural gas pool.

进而，在排除影响地震速度的地表、处理流程、地下特殊岩性体等主要因素的基础上，通过石油地质综合研究认为，构造东高点紧邻生气凹陷、深层储、盖配置良好、晚期成藏，具备形成大型天然气藏的地质条件。

If we could shrink the earth's population to a village of precisely 100 people,with all the existing human ratios remaining the same , it would lood something like the following

如果我们把全世界的人口按照现有的比率压缩为100个人的村子，情况就会如同以下

Based on the evolution history of Moon and other terrestrial planets, continental development process, plate movement tectonics, and solar nebular condensation petrology model that suggested by writers,a discussion about the action of water in Earth's evolution history has been carried.

在地球不均匀吸积模型的基础上，根据比较行星学所获得的行星演化理论、大陆进化的历史、板块运动的特点以及高温高压实验研究结果，对地球演化历史中水的总体行为进行了分析和推论。

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。