由二苯并-1,3-二氧杂 - 环辛烷 -2- 羧酸经两步反应制得, 总收率70%.It was prepared by the reaction of 12 H - dibenzo [ d , g ] [ 1,3 ] dioxocin - 6 - carboxylic acid with acetoxime.地衣是一类独特的生物有机体,其体内合成了多种特殊的次生代谢产物,主要为缩酚酸、缩酚酸环醚 、 缩酚酮、二苯并呋喃等类化合物.A l...
He has a pair of limpid blue eyes.他有一双清澈的蓝眼睛。writes in a limpid style写得明白易懂He thought the speech a model of its kind, limpid and unaffected.他认为这一演讲堪称典范，简洁流畅，清新自然。It's only in those limpid eyes of hers that you see s...
If your skin becomes red, sore or very scaly, consult your doctor.如果皮肤发红、瘙痒或脱皮，要向医生咨询。My skin was hard and scaly and I itched.我的皮肤又硬又粗糙，而且还很痒。The brown rat has prominent ears and a long scaly tail.那只棕鼠两只耳朵向前支着，一条长尾巴布满鳞片。...