例句與造句

1. The compounds with symmetric structure and different size crown ether rings , 16 and 18 , have higher tm and tj than those of the compounds 17 with the asymmetric structure . the tm and ti of compounds 18 is higher than the compounds 16
   含有對稱結構和不同大小冠醚環(huán)的化合物， 16和18 ，它們的熔點和液晶態(tài)的清亮點高于含有不對稱冠醚環(huán)的化合物17 ，且化合物18的熔點和液晶態(tài)的清亮點也高于化合物16的熔點和清亮點。
2. Liquid crystal crown ether is a kind of compound , which remains the liquid crystal property when the crown ether ring link or insert to the molecular structure of liquid crystalline compound . it is in fine - order structure and unite its function and character into together . so it is a kind of novel compound with the characterstic of liquid crystal and the selecting of the crown ether
   液晶冠醚是一類將冠醚環(huán)插入或連接在具有液晶性的分子結構中并保持液晶性質的化合物，這種化合物是一類結構有序且功能特性一體化的體系，它是一類既有液晶特性又有冠醚選擇配位功能的新型化合物，它們在分子結構、性能和應用功能等方面都與通常的液晶化合物不同。
3. Systemic research including the influence of the crown ether ring ' s symmetry , the size and the conformation on the liquid - crystalline behavior have been done in this paper . the synthesis way and method were improved . from the experimental results , it was found that : 1 , compounds 2 , 4 , 16 , 17 and 18 have liquid crystal properties
   優(yōu)化和改進了合成路線及方法，對席夫堿型液晶冠醚，因取代基的大小、冠醚環(huán)的大小和冠醚環(huán)的對稱性以及不同結構的順反構型對液晶性能的影響等諸方面進行了較系統(tǒng)的研究，取得了一系列具有規(guī)律性的結果。
4. It's difficult to find ether ring in a sentence. 用ether ring造句挺難的