Aim To develop a concise method for the synthesis of bicyclic azasugar and thiosugar with novel scaffold.

Synthesis of Methyl Ether of Caged Bicyclic Phosphate

笼状双环磷酸酯甲基醚的合成

Bicyclic amidine-new curing agent for epoxy resin

一种新的环氧树脂固化剂&二环脒

Synthesis of Bicyclic Heterocycles Containing an N-O Bond and Marine Butenolides

含N-O键的双环杂环化合物和海洋Butenolides的合成

Synthesis of an Receptor Containing Chiral Bicyclic Guanidine for Amino Acids

含手性双环胍的氨基酸受体的合成

In this paper, the ideals, bi-ideals and dual-principal bi-ideals of rectangular band, completely simple semigroup, semilattice, Clifford semigroup, matrix unit semigroup, bicyclic semigroup are depicted.

本文给出了矩形带，完全单半群，半格，clifford半群，矩阵单位半群的理想，双理想与双主双理想的刻画。

Synthesis and Catalytic Activities of Bicyclic Chiral Ammonium Salt Phase-Transfer Catalysts Based on Natural Amino Acids

基于天然氨基酸的双环手性季铵盐相转移催化剂的合成及催化性能研究

Bicyclic Graphs with Minimum Wiener Index

具有最小Wiener指数的双圈图

Secondly, starting from phosphorus oxychloride, pentaerythritol, neovaricaine, methacryloyl chloride and hydroxyethyl acrylate, the monomers 3 and 4 which containing the chemical structure of caged bicyclic phosphate were synthesized.

第二部分以三氯氧磷、季戊四醇、乙醇胺、甲基丙烯酰氯以及丙烯酸羟乙酯为原料，合成了含有双环笼状磷酸酯结构的丙烯酸酯单体3和4。

Synthesis of 2,3,7-three substituted bicyclic pyrazolines

2，3，7－三取代双环吡唑啉的合成

Synthesis about a kind of expanding monomer with bicyclic ortho ester group

双环原酸酯类膨胀单体的合成

The calculation of double bond~ ( 13) C NMR chemical shift in bicyclic and polycyclic compounds

双环和多环化合物中双键~（13）c NMR化学位移计算

She tried to get a grip on the icy rock.

她尽力抓住那冰冷的石头。

Try to avoid going outdoors in very cold or icy weather.

在寒冷或冰雪覆盖的天气尽量不要外出。

We stood shivering in the icy wind.

我们站在刺骨的寒风中，浑身直哆嗦。

The icy wind never let up for a moment.

刺骨的寒风一刻不停地刮着。

An icy wind blew hard across the open spaces

刺骨的寒风于开阔处呼啸着。

They were chilled by the icy wind.

凛冽的寒风吹得他们遍体冰凉。

An icy wind swept through the streets

一阵寒风扫过街道。

The icy wind had blasted the new spring growth.

寒冷的风摧残了春天才生长出来的东西。

Although highly technical clothing provides much protection against the extreme cold, scientists often need to go outside when there is an icy wind blowing and the temperature is-30 ℃.

尽管用高科技制造的衣物御寒很有效，但科学家们经常要顶着暴风雪和-30度的低温外出。