brainstorming
noun [ U ] uk/ˈbreɪnˌstɔː.mɪŋ/ us/ˈbreɪnˌstɔːr.mɪŋ/
自由讨论，集思广益，脑力激荡
an activity or business method in which a group of people meet to suggest a lot of new ideas for possible development
We need to do some brainstorming before we get down to detailed planning. 在进行详细计划之前我们需要集思广益。
We're having a brainstorming session on Friday. 星期五我们要进行集体自由讨论。