It was prepared by the reaction of 12 H - dibenzo [ d , g ] [ 1,3 ] dioxocin - 6 - carboxylic acid with acetoxime.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%....
The Chief Constable's clipped tones crackled over the telephone line.电话线那头噼里啪啦地传来警察局长短促的声音。Lights clipped onto life jackets improve the chances of rescue.别在救生衣上的灯提高了获救可能性。He had already clipped his hair close to the...
The most common cylinder head types are the hemi, wedge, and semi - hemi.最常见的气缸盖类型是半球形, 楔形和准半球形.Lignin and small amounts of un - hydrolyzed cellulose and hemi - cellulose are the residues of sawdust hydrolysis.摘要生物质水解残渣中...
The doctor advised him to use fulguration to treat his ulcer.医生建议他采用电灼疗法治疗溃疡.The ulcer has perforated.溃疡已穿孔.Winston reached down and cautiously scratched his varicose ulcer.温斯顿把手伸下去,小心翼翼地搔他的脚脖子.The occurrence of peptic u...