This article introduced a method for preparing α - chloro - isobutylaldehyde , in order to explore a practical chloration of oxo - compound. 本文介绍了制备氯代异丁醛的方法, 其目的在于探索羰基化合物的一种实用的氯代方法.
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....
I struck the ball cleanly and my shot was on target.我干脆利落地击球，命中了目标。Cut them off cleanly through the stem just below the node.就从茎节下面，沿茎干把它们全砍掉。The wounds may heal cleanly or they may ooze a clear liquid.这些伤口可能会利索地愈合，也可能会分...
...clothes with a nostalgic Forties flavour.带有 40 年代怀旧风格的服装The film provided an evening of nostalgic viewing.晚上看了一部怀旧的影片.Although we still depict nostalgic snow scenes on Christmas cards, winters are now very much warmer...