By 8,200 B.C., drought conditions were so severe that the people abandoned their long-established settlement, perhaps dispersing into smaller camps.

公元前8200年的时候，旱情十分严重，这使得人们放弃了居住已久的定居点，并可能散居到更小的营地中去了。

This was more evident under drought conditions.

在干旱条件下更为明显。

It's been fantastic, we've improved drought conditions.

这太棒了，我们已经改进干旱情况。

But drought conditions have been most severe in the South.

然而干旱最严重的是南方。

By fall, however, drought conditions began to expand into the South.

但是，到了秋天干旱开始延伸到南方。

Much of east Africa has been hit by famine as drought conditions worsen.

随着干旱的加剧，东非的大部分地区都面临饥荒的难题。

The same goes for carrots, which might not grow evenly in drought conditions.

胡萝卜也有同样问题，在干旱天气下，不可能长得很匀称。

Effects of synergist on ZR content in rice plant under natural soil drought conditions.

图2土壤自然干旱条件下增效剂对水稻植株玉米素核苷含量的影响Fig。

Much of China's Yangtze River region is currently battling the worst drought conditions in 50 years.

中国长江中下游大部分地区正遭受50年来最严重的旱灾。

But the report says there is some evidence of increased drought conditions in the west and Southwest.

但是报告指出有些证据表明西部和西南地区的干旱情况有所加重。

During drought conditions, the role of rice paddies acting as methane sink should be estimated.

应开展落干期间水田作为大气甲烷汇的作用的研究。

77 of Texas's 254 counties are experiencing "exceptional" drought conditions, the worst category going.

我的翻译是德州254个郡中，有77个郡的旱情最为严重，可谓异常干旱。

Even under drought conditions, trees can often provide food and a way to earn money until the next growing season.

即使在干旱情况下，树木也常常能提供食物和挣钱的途径，直到下一个生长季到来。

While drought conditions prevail in the U.S. southern plains, there has been too much rain in some areas further north.

虽然美国南方平原地区普遍干旱，但是北方一些地区却降雨过量。

According to our assessment of the standard soil moisture drought, drought conditions on the study area were evaluated.

根据我国的土壤水分旱情评定标准对研究区的干旱情况进行了评价。

But these slow-wilting lines, he says, produce four to eight bushels more than normal soybeans under drought conditions.

但是这五种胚质在干旱的条件下比普通的大豆的产量多出四到八蒲式耳。

While drought conditions prevail in the U. S. southern plains, there has been too much rain in some areas further north.

虽然美国南方平原地区普遍干旱，但是北方一些地区却降雨过量。

Under extreme drought conditions, water is the main factor affecting the environment which limits the type and quantity of perennials.

极端干旱条件下，水是影响环境的主要因子，将限制多年生植物的种类和数量。

First, ICRISAT mapped the genomic regions of pearl millet that control downy mildew resistance, grain production and straw yield under drought conditions.

首先，国际半干旱热带作物研究所绘制了珍珠谷子的基因区，这些谷子可控制干旱条件下的霜霉病抗性、谷物产量和产草量。

On a hot summer day, when drought conditions peak, something as small as a spark from a train car "s wheel striking the track can ignite a raging wildfire."

在炎炎夏日的一天，当到达了最干旱的条件时，像被汽车轮胎压过的如火光一样小的东西就能点燃一场森林大火。

Last month Texas's governor, Rick Perry, issued a disaster proclamation for much of the state, noting that the drought conditions have worsened the threat of wildfires.

上个月，德州州长，里克·佩里对大部分县发布了灾害声明，并指出，干旱情况在不断恶化。

East African countries usually receive heavy rainfall during an El Nino. Southern Africa usually has little rainfall, which may lead to wildfires or drought conditions.

东部非洲国家通常在厄尔尼诺期间遭受暴雨。南部非洲通常降雨不多，这可能会导致森林火灾和干旱情况。

The results showed that the growth of seedlings was promoted by exogenous polyamines under normal water and drought conditions, and more notable under drought condition.

结果表明，在正常和干旱条件下，外源多胺均能促进油松幼苗的生长，且干旱条件下的促进效果更为显著。

Under drought conditions, the order of 3 varieties in deep soil root density and the ratio increment of root to stem was ranked as follows: Brooklawn, Impact, SupraNova.

干旱条件下，土壤深层根系密度、根冠比增加的顺序依次为布鲁克、英派克、苏比纳。

But Lynch has published a paper that identified a previously unrecognized trait that improved yields eight times in experimental corn lines grown under drought conditions.

但林奇在一篇发表的论文中称他们已经找到了一个以前从未发现过的新品种，它在实验条件下，即使条件干旱，产量也能增加八倍。