Esperanto is used internationally across language boundaries by at least 1 million people, particularly in specialized fields.

世界语方便了世界上至少100万操着不同语言的人交流，特别是在专业领域。

He's a renowned psychiatrist and published author with a very specialized field of expertise.

他是享有盛誉的精神病医师，并在非常专业的学术领域发表过著作。

On the other hand, students who have graduated in specialized fields often find that they have learned a lot of things in classrooms that they will never use.

在另一方面，从专门领域毕业的学生常发现他们在课堂上学到的很多东西永远也用不上。

The first entry said, " The method of human communication, either spoken or written, consisting of the use of words in a structured or conventional way." The definition at the bottom refers to specialized fields, like medicine, science, tech.

第一个条目说， “人类交流的方法， 无论是口头的还是书面的，包括以结构化或常规方式使用单词。 ” 底部的定义指的是专业领域， 如医学、科学、技术。