There were actually two periods of rain and lake formation: the first one began about 37,000 years ago; and the second one dates from about 10,000 years ago.
事实上，这里有两个时期的降雨和湖泊形成：第一个始于大约37000年前；而第二个可以追溯到约一万年前。
Zack and his colleagues combined survey results from the two periods to assess geographic patterns in perceived mental distress.
Zack和同事们结合了两个时间段的研究结果，以评估所观察的精神苦恼发病在地理上的模式。
A range of integers separated by two periods.
被分隔成两个周期的一个整数范围。
The growth in rice yields between the two periods halved.
在两个时期间的水稻产量增长减半。
There is a two-minute interval between two periods for changing ends.
每两节之间有两分钟的间歇供队员交换场地。
Association between Byzantium and East Slavs(6th—9th) divided two periods.
拜占廷与东斯拉夫人的交往（6—9 世纪）可为两个时期。
But he agreed that two periods in recent times had experienced similar warming.
他承认，近代经历了两个相似的气候变暖阶段。
Moreover, multistate geographic patterns were evident for the combined two periods.
另外，从两个时间段的综合数据来看，很多州发病率的地理差异很明显。
Nandu, as a turning point, made her life divide into two periods of happiness and bitterness.
李清照的一生以“南渡”为转折点，其生活分为美满幸福和流离困苦前后两个不同的时期。
Our justification of the present value rule wasrestricted to two periods and to a certain cash flow.
我们对于现值规律的判断是限定在两个时期以及特定的现金流情况下才成立的。
You will learn after tampon use for one or two periods how often you need to change your tampon.
您将掌握如何改变你的卫生棉条在经过使用一个或两个经期的学习使用之后。
Li Qingzhao was an outstanding poetess of the Song Dynaoty. Her ei can be divided into two periods.
李清照是宋代杰出的女词人，她的词以南渡为界，分为前后两期。
In these two periods, they have their own characteristics because of the dissimilar times and environments.
由于时代环境的不同，这两个时期的通俗小说有其各自的特点。
These two periods are used to provide year-over-year comparisons, which are very important in financial analysis.
这两个时期用于提供与去年的同期比较，这对于财务分析十分重要。
Interpretation: there are the basis of the first two periods, learning English, in fact, do not need to be so tired.
释义：有了前面两段时间的基础，学英语其实不需要那么自己累自己的。
Western Ancient Philosophy after Aristotle is usually divided into two periods: Hellenistic period and Late Antiquity.
亚里士多德之后的西方古代哲学常分为希腊化和古代晚期两个时代。
The phonetic research of the Modern Chinese in the 20th Century is roughly divided into three parts of the two periods.
20世纪中国的近代汉语语音研究可以大致划分为两个时期、三个阶段。
Two periods plagued by unrest and warfare and three relatively peaceful periods follow the temperature undulation inversely.
在这个500年期间，有两个灾难性的动乱时段和三个相对平静的时期，它们与气温的变化呈反相位的波动。
The authors compare the profitability of small Banks operating in only one local market in two periods, 1982-90 and 1991-2000.
这四位作者对1982- 90和1991 - 2000两个时期内只在单一市场经营的小银行的盈利能力进行了对比。
Finally, two methods for dynamic adjustment are given, when the levelling networks of two periods do not coincide completely.
最后，介绍了当两期水准网不完全重合时，如何进行动态平差的两种处理方法。
Shouting cheap is a , helplessly swung two periods arm, she ran out whole body energy can not also from his strength the base set free.
低呼一声，无助的晃了两下胳膊，她用尽全身力气也无法从他的力量下解脱出来。
We compartmentalized two periods to calculate economic benefits and adopted two methods to analyze benefits in 1949~1990 and 1990~2005.
治涝经济效益计算与分析分两个时段进行，1949～1990年及1990～2005年，采用两种不同的方法进行评价。
Basin development in Bobal Bay comprises two periods, i. e. rifting and depression, during which very thick Tertiary sequences deposited.
渤海湾盆地经历了断陷和拗陷两个发育阶段，其间接受了巨厚的第三纪沉积。
One matter they raised was the possibility that two periods of conflict in the area, in the 15th and 18th centuries, were provoked by droughts.
他们提出的一个问题是在这个地区中15世纪和18世纪两个时期的冲突，是由于干旱。
The interaction between them could be divided by the launch of NATO' s eastward expansion into two periods - cooperation and confrontation.
回顾两国在该领域的互动，大致以北约启动东扩为分界点划分为合作与对抗的两个时期。
Interestingly, in the upper grades, teachers typically teach just two periods a day (typically 45 minutes in length) out of eight or nine periods.
有趣的是，在高年级，每天有八到九节课，而每位老通常每天只上两节课（每节课一般十五分钟）。
His creative period can be approximately divided into two periods: one mainly focuses on musical composition and the other on theoretical research.
陆华柏先生是我国老一辈音乐家，他的创作时期大致可以分为以音乐创作为主和以理论研究为主两大时期。
His creative period can be approximately divided into two periods: one mainly focuses on musical composition and the other on theoretical research.
陆华柏先生是我国老一辈音乐家，他的创作时期大致可以分为以音乐创作为主和以理论研究为主两大时期。
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