set the trend

• (在风尚、式样上)开个头； 带个头

set the trend的用法和样例：

例句

1. Somebody will have to break the ice.
   总得有人开个头。
2. But the very hairs of your head are all numbered.
   意思系咪即系成个头的毛毛都包括在内？
3. We plan to be in the forefront of that.
   我们准备在这方面带个头。
4. Therefore,we say it would be better for us old comrades to take an enlightened attitude and set an example in this respect.
   所以我们说，老同志带个头，开明一点好。