十二个的

In the first part of the 20th century, the average age at menarche declined by two to three months each decade, falling from about 17 to 13, in both the United States and Europe.

二十世纪的前部分，月经初潮的平均年龄每十年降低2-3个月，从17 到13，美国和欧洲都是如此。

One Sufi shaikh said,"Because I safeguarded my heart for ten nights, my heart has safeguarded me for twenty years."

一位苏菲师衣海说："因为我看守自己的心十个晚上，我的心看守我二十年。"

It takes place over three weeks,and there are twenty separate stages.

它在三个星期内发生，而且有二十个分开的阶段。

It was sunny the second day, twenty to seven in the morning, one little life had birth that has been in her mother' body for ten months, it was just result of love my wife and I each other.

二号是个晴天，太阳露出了笑脸，早晨七点20分，一条在母亲体内孕育了十个月的小生命终于诞生了。

Qianlong 15 years (1750), the Qianlong emperor in the Qing Yi here converted to a park, as a centre of the garden on both sides of the four a body , formed from Tsinghua is the Xiangshan Park to a 20 km area at the Royal Garden . 1860-Yi Park was burned British and French allied forces.

乾隆十五年（1750年），乾隆皇帝在这里改建为清漪园，以此为中心把两边的四个园子连成一体，形成了从现清华园到香山长达二十公里的皇家园林区。1860年清漪园被英法联军焚毁。

If you divide the 20th century into quartiles, the period when the initial yield gap was highest (ie, bonds yielded more than cash) saw a subsequent ten-year real return from gilts of just 0.3%.

如果你把二十世纪分成四个时期，初始收益差最高的时期（例如，债券比现金收益大）之后会遇到十年金边债券净收益只有0.3%的情况。

The vast Laure, meltingly maternal as ever, used often to invite her to pass a day or two at her Asnieries Villa, a country house containing seven spare bedrooms.

而丰唐呢，恰恰相反，每当他没有拿出每枚合二十个苏的三个法郎，却照样有饭吃，他就非常快乐，使劲地吻娜娜，还抓住椅子跳华尔兹舞。

China and Russia, the two neighbored socialism countries, have greatly changed both in political ideology and economy since 1990s.

二十世纪九十年代以来，中俄作为两个相邻的社会主义大国，无论经济，还是政治都发生了翻天覆地的变化。

Two compounds have been isolated from hard coral Porites Compressa Dana,their structures were determined by IR,MS, HNMR, 13CNMR analysis.The two compounds are: batyl alcohol,(2) N-[l--2-hydroxyl--3,7-heptadecadienal]- h exadecanamide.

从采自西沙群岛的扁缩滨珊瑚中的石油醚部分分离出两个化合物，经IR、MS、~1HNMR、~(13)CNMR等波谱方法鉴定，其结构分别为(1)鲨肝醇，(2)N-1-羟基甲基-2-羟基--3，7-十七碳二烯基十六酸酰胺。

Ckets under one board for his two tenons, and two sockets under another boa

26：19 在这二十块板底下要作四十个带卯的银座，两卯接这块板上的两榫，两卯接那块

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐