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- In the classical graphology, it was always known that the theory of "four natures and two usages" was first put forward by DAI Zhen of the Qing Dynasty, who also took the credit for himself. 摘要传统文字学上的“四体二用”说，其倡始者，学术界普遍认为是清代的戴震，戴震自己也坦然以倡始者自居。
- Benner has designed a DNA molecule with eight new chemical”letters” and in addition to four natural “letters”. Benner已经设计出一个有着八个新化学“字母”DAN分子，其中有四个自然的化学“字母”。
- four natures and five flavors of drugs 四气五味
- four natures of Chinese materia medica 中药四性
- Methods Three-dimensional determination for four natural organic compound samples by using single crystal X-ray diffraction. 方法应用单晶X射线衍射分析方法对4个天然有机化合物样品进行三维结构测定。
- the theory of four natures and two usages 四体二用
- It is discovered from a specific mast that the first four natural frequencies have a high fluctuation of 26% when the base frame is constru... 由实际算例确定,在岩土及碎石土和亚粘土两种不同地基上,井架系统的前四阶固有频率将有高达26%25的波动。
- This article introduced four natural pigments:moascus colors,natural carotenes,jujube pigment,Capsanthin and their basic character,distilling techniques and application. 开发天然色素是世界食用色素发展的总趋势,本文介绍了四种极具发展前景的天然色素:红曲色素、天然胡萝卜素、酸枣色素、辣椒红素。
- The paper studies the silks qualities and mechanical properties as well as the economicperformances of four natural yellow cocoons,then compares them with those of white steam filature. 研究了4种天然黄色蚕茧的经济性状和茧丝的丝质及力学性能,并与白厂丝进行了比较分析。
- It is clear to all of us that two plus two is four. 二加二等于四对我们大家都很清楚。
- It is the world's most typical Coste landscape with 350 square kilometers, and it has been called the "natural museum landscape modeling,"It is one of the four natural landscapes in China. 是世界最典型的科斯特地貌景观，范围达350平方公里，素有“造型地貌天然博物馆”之称，是中国的四大自然景观之一。
- He wove four plots together into a novel. 他把四条情节编成一部小说。
- We have tea at four o'clock in the afternoon. 我们在下午四点钟喝茶。
- The discriminatory analysis of the four natures of fruits 水果四性判别分析
- The town boasts four swimming pools. 这座城镇以拥有四个游泳池而自豪。
- Our football team won by four goals to nil. 我们的足球队以四比零取胜。
- He lay back and hit the ball for four. 他向后弯身击中球，得了4分。
- I was clean broke in less than four days. 不到四天我就一个钱也没有了。
- I'll look out for you at about four. 我4点钟左右找你。
- He showed us four case studies of disturbed girls. 他给我们看了4位精神失常姑娘的病历。
