In July comes the Tour de France, when 200 cyclists cover a course of 2,000 miles.

Wearing helmets gave cyclists a false sense of security and encouraged them to take risks.

戴头盔给骑自行车的人一种错误的安全感，怂恿他们去冒险。

He had ridden out of Cambridge, inconspicuous among the hundreds of young cyclists.

他已骑车出了剑桥，淹没在几百名年轻的自行车手当中。

Cyclists please dismount at the gate.

骑自行车出入请下车.

I am brushed against by cyclists.

我被骑车人一擦而过.

The series of steep hills sapped the cyclists'strength.

一连串坡度很大的小山耗尽了骑车人的气力.

Car horns toot as cyclists dart precariously through the traffic.

骑车人危险地在车流中飞速穿行时，汽车喇叭的嘟嘟声响成一片。

Sodium ethylate was used as catalyst in Baker-Venkataraman of cyclization, and all factors were studied.

环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂, 研究了影响反应的各个因素.

Methods: Starting from diethanolamine, BP 897 was prepared via chlorination, cyclization, substitution aminolysis and condensation reaction.

方法: 以二羟乙基胺为起始原料, 经过氯化 、 环合 、 取代、肼解、缩合等反应合成BP897.

Methods: Simvastatin was synthesized from lovastatin via acetylization, methylation, hydrolytic decomposition and cyclization reactions.

方法: 以洛伐他汀为原料,通过酰化 、 甲基化 、 水解、环合等反应合成了辛伐他汀.

The effect of solvents and steric hindrance on the stereochemistry of cyclization is investigated in details.

并且考察了在环合反应中溶剂和空间位阻对立体选择性的影响.

This paper describes the various cyclization reaction by neighboring group participation.

本文总结了邻基参与的各类环化反应.

Application of samarium diiodide in mediating intramolecular cyclization reactions was reviewed.

综述了二碘化钐在分子内环化反应中的应用.

METHODS Cilnidipine was synthesized from cinnamyl alcohol by esterification, feminization and condensation-cyclization.

方法以肉桂醇为原料,经酯化 、 氨化和缩合 - 环合而得.

Menthol was obtained from lemon eucalyptus oil via cyclization and catalytic hydrogenation.

以柠檬桉叶油为主要原料经环化、催化氢化二步反应得到薄荷醇.

Sulfuric acid and acetic anhydride were used as a cyclizing agent to prepare Ofloxacin intermediate.

用硫酸乙酐混合物作环合剂,制备了氟嗪酸中间体.

According to the control characteristics of cyclo converter, paper proposes a new multi-CPU computer control system.

根据交-交变频器的控制特性, 提出了较为新颖的多CPU计算机控制系统结构.

The feasibility of the new cyclo converter and its performancesteady state are validated by simulation.

通过仿真计算验证了其反送功率至工频系统可行性.

Silazanes were divided into chain-silazane, cyclo-silazane and poly-silazane according to the material variety and synthesis method.

硅氮烷根据原料以及合成方法的不同可分为链 硅氮 烷、环硅氮烷、聚硅氮烷等.

AC excited generator ( ACEG ) and cyclo converter are principal harmonic sources in ACEG systems.

交流励磁 电机和交交变频器是交流励磁电机系统中最主要的两个谐波源.

Finally , cyclo (-Ab 7-Aib-Phe ( 2-Me )-D-Pro-) is successfully prepared by using liquid phase peptide synthesis with Boc protection.

Boc -Ab7-Aib-Phe( 2-Me)-D-Pro-OBzl脱除两端保护得到线性肽链经过环化得到目标产物cyclo ( -Ab7-Aib-Phe ( 2-Me ) -D-Pro- ),收率0.8%.