十亿

Geological evidence suggests that oxygenic photosynthesis, such as that in cyanobacteria, became important during the Paleoproterozoic era around 2 billion years ago.

地质学的证据建议oxygenic光合作用，例如那在蓝细菌，变得重要在Paleoproterozoic时代期间大约2十亿年前。

Billions of dollars are spent every year to persuade customers to buy one pand of product rather than another.

每年花在广告上的经费有好几十亿美元，以说服顾客买某个品牌的产品而不买别的家的。

Genesis hypotheses include a galaxy collision billions of years ago and perturbative gravitational interactions involving an unusually shaped core.

此种星系的起源假说包括：在数十亿年前所发生的星系碰撞，或者是一个具有不寻常形状的星系核在紊乱重力作用下产生的。

Why do some governments persist in spending billions of dollars on space ex ploration when starvation and poverty continue to grip many countries throughout the world ?

既然世界上许多国家仍被饥饿和贫困所困扰，为什么有的政府还坚持花费数十亿美元用于太空探索？

Venezuela has been in a deep recession this year, despite pocketing many billions of dollars in recent years.

尽管近年来获得了数十亿美元收入，但委内瑞拉今年仍陷入了严重的衰退。

The founders have an altruistic desire to make information available for free (while pocketing billions of dollars from advertising).

创始人有一种利他主义的愿望，使信息可免费获得（不法之徒的同时，数十亿美元的广告）。

Census data are used to apportion and redistrict Congress and to help allocate billions of dollars in federal assistance to state and local governments each year.

普查数据是分配和划分选区、联邦向州和地方政府分配每年达数十亿美元援助资金的重要依据。

Apple shares fell almost $5 as soon as trading opened the following day—wiping out about $4 billion of the company's market value—although the stock retook some of the lost ground before day's end.

苹果的股价在第二天一开盘就下跌了5美元（公司的市值损失了四十亿美元）只是尾端时间收复了一点失地。

Scarily, it did not take much estrogen to affect the fish — just 5 or 6 nanograms, or billionths of a gram, per liter of lake water.

令人吃惊的是，每升湖水中仅仅5'6纳克或者十亿分之一克的雌激素就能对鱼类产生如此影响。

"Designer skyline with glowing pillars and a sculpturesque telephone tower, seen from the Olympic esplanade, reminds strollers of the city's adventurous, multibillion-dollar makeover for the [1992] games."

&天际线设计者和光辉的支柱和雕刻般的电话塔，从奥林匹克平坦的空地，提醒散步者城市的大胆冒险，价值数十亿美元改头换面因为（1992）游戏&。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。