You can send the letter by airmail ( regular mail, registered mail ).

The postage for airmail is greater than that for regular mail.

航空信的邮资比平信高.

Objective : To explore and regularities of diagnose method for oral mucosal stria diseases.

目的: 探讨口腔黏膜斑纹类疾病诊断方法选择的规律性.

The change regularities on void fraction and density of powder material were revealed mathematically.

同时,运用数学的方法揭示了粉体的空隙率和粉体密度的变化规律.

These curious regularities have more than numerological appeal.

这些不同寻常的规则比命理学还具有吸引力.

Primary purpose is to correlate regularities: for a limited range of experimental date.

主要目的是对有限范围内的实验数据总结出规律来.

All the regularities of the students in that university resulted in punishment.

在那所大学,学生的任何越轨行为都受到惩罚.

Based on a series of measurements some effecting regularities of working parameters were also obtained.

通过实验,获得一些参数对引射器工况的影响规律.

Our experience meanwhile is all shot through with regularities.

我们的经验同时也都具有规律性.

There are various regularities and relations among the characteristics of root.

结论:目前市场上的山参类药材分为四类:野山参、山参、山参和池底子,正确地鉴别山参类药材,必须综合各种性状.

The verification methods are simply described, and the regularities to be followed are discussed.

介绍了检测方法, 讨论了方法必须遵循的规范性要求.

Objective To study the regularities of succinate dehydrogenase ( SDH ) and adenosine triphosphatase ( ATPase ) in myocardial cells with aging.

目的　探讨大鼠心肌细胞琥珀酸脱氢酶 ( SDH ) 和三磷酸腺苷酶 ( ATPase ) 的增龄变化规律.

Applying finite element method and programming subprogram to study distributed regularities of dam's stress and strain.

应用有限元法,编制子程序,研究了重力坝应力和应变分布规律.

Regional distribution regularities of China's uranium resources are expounded in this paper.

本文主要是论述中国铀资源区域分布规律性.

They had observed regularities in the behaviour of the animals.

他们曾观察过这些动物的习性。

The great characteristic of the Nile is the regularity of its floods.

尼罗河的最大特征就是河水定期泛滥.

Can you find any regularity in the mistakes of your method?

你能找出你的方法的缺陷中的规律 吗 ?

In Qinling and Dabashan area, metal resources store of rich with clear mineralization regularity.

秦岭—大巴山地区金属资源蕴藏丰富,成矿规律明显.

New word formations have not regularity.

新词的构成没有规律.

The regularity of the crystal goes beyond this, however.

然而,晶体的规则性不止于此.

Climate change is disrupting the regularity of the seasons.

气候的变化正在打乱季节的规律性。