本发明公开了一种由吡咯、芳香醛和空气为原料高产率合成四芳基卟啉的 方法和设备。
The invention discloses a method and an apparatus for the synthesis of tetaraary porphyrin at high yield with raw materials including pyrrole, aromatic aldehyde and air.
梅兰芳、程砚秋、尚小云和荀慧生被合称为京剧四大名旦。
Mei Lanfang, Cheng Yanqiu, Shang Xiaoyun, and Xun Huisheng are recognized as the four greatest artists of Beijing Opera.
今天你年芳40了,我爱你……瞧,奔四没这么可怕的。
You're 40 years YOUNG and I love you... you see? Turning 40 isn't so bad.
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