5.说明定义
Google, broadly defined as the largest comprehensive search engine in the world, decided to withdraw from the Chinese mainland in 2010.
谷歌，被广义定义为全球最大的综合搜索引擎，2010年决定退出中国大陆市场。
Diabetes mellitus, defined as a metabolic disease series characterized by sharp increase of the level of glucose or sugar in blood caused by the defect of insulin secretion or the vitium of insulin functioning, has been a difficult problem in medical community for a long time.
糖尿病，被定义为由胰岛素分泌缺陷及/或胰岛素作用缺陷而引起的以血浆葡萄糖水平升高为特征的代谢性疾病群，多年来一直是医学界的一个难题。
Semiotics, generally defined as the academic study of the relationship of language and other signs to their meanings, is becoming the new research hotspot in the linguistic field.
符号学，通常被定义为语言和其他符号与其意义的关系的学术研究，正在成为语言学界新的研究热点。
Mixed school refers to the so-called co-educational school, which means both boys and girls are educated together.
男女混合学校指的是所谓的共同教育学校，指的是男生和女生在一起接受教育。
Etymology refers to the study of the origins and historical development of words, which means it is an inevitable part in lexicology study.
词源学是指对词汇起源和历史发展的研究，这意味着词源学是词汇学研究中必不可少的部分。
“Blue blood”refers to the people who are from noble or extremely rich and powerful family, which means they are more distinguished than our normal people.
“蓝血”指的是来自贵族或极富有和强大的家庭的人，这意味着他们比我们普通人更受人尊敬。