Their voices blend marvellously as they sing in chorus.他们合唱时嗓音非常和谐.The children repeated the words after her in chorus.孩子们跟她齐声朗读单词.The students began to read the text in chorus.学生们开始齐声朗读课文....
The document was authenticated by a seal.文件有印鉴为凭....note paper bearing the Presidential seal...盖有总统印章的便笺Improved injector nozzles seal off better to keep the process leak - free and the molding operation dry.改进了的注射喷头密封更好...