China boasts the world's earliest observatory, built in Nanking in 1385 in the Ming Dynasty ( 1368 A . D . - 1644 A . D . ), three centuries ahead of the Greenwich Observatory built in Britain in 1670.中国建有世界上最早的气象台....
At that moment, there was a rattling at the door.那时，突然出现咚咚的敲门声。It is too early to say whether the threats are mere sabre-rattling.现在断言这些威胁是否只是虚张声势还为时过早。This book is a rattling good read.这是一本非常好的读物。...
Loteprednol etabonate was synthesized through oxidation, acylation, hydrolysis and chloromethylation from the starting material prednisolone.以泼尼松龙为原料,经氧化 、 酰化 、 水解成盐、氯甲基化成酯制得氯替泼诺.An enzyme that catalyzes the hydrolysis o...
“在那儿等着！”凯瑟琳站起身来，“不，我改主意了。跟我来。”"Wait there!" Kathryn rose. "No, on second thought, follow me."理查德站起身走到了窗边。Richard stood up and walked across to the window.她站起身，开始来回踱步。She stood up and began to pace to and fro....