1. Indeed, the concept of free speech only exists in our modern society
    的确，言论自由的概念只存在于我们现代社会中，

2. Imedeen fits this concept by providing for the skin's needs.
    "伊美婷"通过提供皮肤所需的养分而做到了这一点。

3. For him, schools are an out-of-date concept from the days of the town crier (市政传令员), when it was difficult to get information and a central person was needed to communicate knowledge.
    在他看来，从靠市政传令员口述传达重要信息的时代以后，学校已是过时了。当时人们很难得到信息，因而需要一位重要人士来传递信息。