查询词典 periods

The primary cosmic radiation that reaches the earth is minimum at periods of maximum solar activity.

在极大的太阳活动时期，到达地球的初级宇宙辐射是极小值。

Trichogramma showed high control efficacy on cotton bollworm eggs after three times of release both in the second and in the third generation bollworm periods. The parasitism on the second and third generation bollworm eggs were 66.0%-70.7% and 76.0%-81.2%, respectively, which were significantly higher than that in the control (second generation: 7.0%-12.3%, third generation: 5.2%-7.4%). And the injury rate of cotton buds and bolls in the second and third generation bollworm were 2.2% and 3.1%, respectively, which were significantly lower than that in the control (second generation:8.5%, third generation: 20.9%). In the second generation bollworm period, number of bollworm eggs or larvae in the Trichogramma released cotton field did not differ to that in the chemically controlled field. But in the third generation, there were significantly less bollworm eggs and larvae in the Trichogramma released cotton field. There were more predators in the Trichogramma released cotton field. These results indicated that cotton boll worm in the transgenic insect-resistant cotton field can he effectively controlled by mass-releasing of T.

结果发现：棉铃虫卵在棉株不同部位的分布差异较大，2代棉铃虫卵主要分布在叶正面、叶背面和茎尖，3代棉铃虫卵主要分布于蕾铃；在放蜂田，赤眼蜂对棉株不同部位棉铃虫卵的寄生率差异较大，2，3代棉铃虫时期对叶正面、叫背面、茎尖、蕾铃的棉铃虫卵寄生率均较高，对叶柄和茎杆处卵的寄生率较低；并以3代棉铃虫时期的寄生率较高；在2，3代棉铃虫时期分别连续释放3次赤眼蜂，对棉铃虫具有很强控制作用，2，3代棉铃虫卵的被寄生率分别为66.0%~70.7%和76.0%~81.2%，均显著高于化防田的自然寄生率（2代：7.0%~12.3%，3代：5.2%~7.4%）；蕾铃被害率分别为2.2%和3.1%，均显著低于化防田（2代：8.5%，3代：20.9%；2代棉铃虫时期，放蜂田和化防田的棉铃虫卵量和幼虫数量差异均不显著，但3代棉铃虫以后，放蜂田棉铃虫卵量和幼虫数量均显著低于化防田，且放蜂田的捕食性天敌数量显著高于化防田。

As a long standing essential policy of our Party and country,it shows different meanings in different historical periods.

它长期作为我党我国的基本方针政策，在不同的历史时期具有不同的指导意义。

In view of risk-neutral probability measure, this paper discusses the pricing of coupon bond in several periods and the pricing of options on the bond in floating interest rate. The article sets up a model of bond price in an enterprise.

本文主要是在风险中性测度下，基于浮动利率条件，讨论带有违约风险的多时期附息票债券的定价问题及基于该类债券的期权定价问题。

Coutts notes that periods of increasing inflation make investors nervous about the future.

顾资指出，通胀不断升高的时期使投资人忧心未来。

Nursing care content includes:(1)Closely watching patient's WBC change during chemotherapy periods and applying leukogenic drugs for serious WBC fall patients.(2)Periodically sterilizing peripheral skin of opening of wound and outside catherter,and coving and changing sterile dressing for one time every two days or one time everyday when it is hot.(3)Irradiating wards with ultraviolet ray and sterilizing air everyday.(4)Helping patients to get up and do sports to strengthen organism's antiinfectionability.

护理内容包括：(1)在化疗期间密切监测病人白细胞的变化，对白细胞显著下降者应使用升白细胞的药物；(2)定期消毒处理创口周围皮肤和外露导管，更换覆盖无菌敷料，一般隔日1次，天气炎热，每日1次；(3)每日进行病室紫外线照射和空气消毒；(4)协助病人多下床运动，以增强机体抗感染能力。

This studies tested some different ways to slow down heat stress of Holstein cow in summer periods and to improve their milk performance by supplementation of NaHCO_3 and mini-nutritious compound and adoption of physical colling in cowhouse.

试验研究了淮南地区奶牛的发展现状及存在的主要问题，针对夏季高温对奶牛生产性能的不良影响，提出了在现有的饲养条件下，采用在奶牛饲粮中添加碳酸氢纳、微量营养复合添加剂以及物理降温等不同技术措施，以达到减缓季节高温对奶牛造成的不良影响，提高奶牛产奶性能的目的。

It freed me to enter one of the most creative periods of my life.

我的第三个故事是关于死亡的。

Leopard cats exhibited arrhythmic activity with increased activity during nocturnal and crepuscular periods.

在夜间和晨昏时节，豹猫活动增加，但是并没有节律性活动。

They diversified and evolved, and dominated the Earth during the Jurassic and Cretaceous periods that followed.

他们多元化的演变着，并在侏罗纪和随后的白垩纪时期主宰着地球。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。