至

Initially established during the Preclassic period (c. 2000 BC to 250 AD), many Mayan cities reached their highest state development during the Classic period (c. 250 AD to 900 AD), and continued throughout the Postclassic period until the arrival of the Spanish .

初步建立在Preclassic时期（约公元前2000年至250年），许多玛雅城市达到国家最高发展在古典期（约公元250至900年），并继续在整个Postclassic时期，直到抵达西班牙。

In the system of potash feldspar with desulfurization ash ,when addition of sodium sulphate was 3%,the digest.

当硫酸钠添加量为4.76%时，反应温度可降至1050℃，表观活化能可降至81.97 kJ/mol；对于添加脱硫灰渣的钾长石体系，当硫酸钠添加量为3%时能显著提高钾溶出率，此时钾溶出率为71%～74%。

University of Munich experts in the oil potato chips and crisps were found in the glycerol amine dose of 0.3 micrograms per kilogram to 1.5 micrograms, the same volume of French fries and potato chips in the acrylamide is 300 micrograms to 600 micrograms, and Acrylamide in human liver can be transformed into part of glycerol amines.

慕尼黑大学专家在油炸薯条和薯片中发现的甘油胺剂量在每公斤0.3微克至1.5微克，同样量薯条和薯片中的丙烯胺为300微克至600微克，而丙烯胺在人体肝脏中又可以部分转化为甘油胺。

The dissolubility of PPLA in water was (2.16～4.32)×10－2 mg·mL－1 according to eye judgment. The critical micelle concentration was 2.16×10－2 mg·mL－1 obtained from a fluorospectrophotometer. The self-assembled aggregates of PPLA in water were nanoscale spheres observed by a transmission electron microscope. The particle size and zeta potential tests by dynamic light scattering revealed that during preparation, the ratio of hydrophilicity/hydrophobicity, the aqueous medium and the pH had great influences; while dilution, freezing and pH change to basic condition had no effect after preparation, but pH change to acidic condition made the nanoparticles precipitate.

目测法得到其溶解度为(2.16～4.32)×10－2 mg·mL－1；荧光法得到聚合物的临界胶束浓度为1.12×10－3 mg·mL－1；透射电子显微镜观察显示该聚合物在水中的自组装聚集体为纳米级球形；动态激光光散射测试微球的粒径和Zeta电位发现，在微球的制备过程中，聚合物的亲/疏水性比例、水相介质及水溶液的pH值对它影响显著；而制备后，稀释和冷冻对它无显著影响，改变微球的环境pH值至酸性，出现聚集，至碱性无影响。

2Notice of readiness shall be tendered by fax/e-mail during office hours between 8:00 and 17:00 Monday to Friday whether vessel in port or not, whether vessel in berth or not, whether vessel has been customs cleared or not, whether vessel has been granted free pratique

船是否在港口，是否在码头，是否已通关，是否有自由入港许可等须在周一至周五8：00-17：00传真或电子邮件至买方办公室。

Most prefabricated shelters are between 8 to 10 feet high on the backside and 9 to 12 feet high on the open side.

大多数预制收容所8至10英尺高的背面及9至12英尺高的开放的一面。

The pH in the lysosome increased 1 h and restored premedication level 4 h after benflumetol administration.

本芴醇单次给药后1 h起疟原虫溶酶体pH值开始升高，药后3 h升至最高，药后4 h原虫溶酶体pH值恢复至药前水平。

The missile has a circular error probable of 80 to 120 meters on inertial guidance alone, 30 to 50 meters when incorporating satellite guidance, they said.

导弹具有圆概率误差120米至80月，仅惯性制导、 1930年至1950年时，将卫星制导米，他们说。

The subjects were selected by the "probability proportional to size" sampling method from Taipei County from February to July 1988. A total of 2,367 mothers of children were questioned in personal and/or telephone interviews. The response rate was 74%.

以等机率分层分段抽样方法，自台北县内选取12至23个月大之幼儿为样本，於民国七十八年一月至七月间，针对幼儿母亲以家庭访视和电话访问方式，共收得2，367位个案资料，完访率达74%。

In the saxon kingdom of wessex, king alfred (871 －99) and his successors did much to keep english alive by using it as the language of education and learning; by the tenth century there was a considerable amount of english prose and verse literature.

在西撒克斯的撒克逊王国，阿尔弗雷德国王(871至899年)及其后继者们通过把英语作为教育和学术语言，不遗余力地维持英语的活力。至10 世纪，用英语写作的散文和诗歌文学已有相当的数量了。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。