【正确答案】正确答案：It mainly means that a phrasal constituent can be emended with(i.e., be dominated by)another constituent having the same category, but it can be used to any means to extend any constituent. Together with openness, recursiveness is the core of creativity of language. For instance, a NP can contain a PP, for example,[the fish[in the pool\]\], and a PP can again contain a NP and the NP can contain another PP,[the fish[in[the pool[in the garden\]\]\]\], and so on.

【答案解析】解析：(考查递归性)