weathervane是什么意思音标:英 [ˈweðəveɪn]
a. 政治风方向标的（指表明当前投票倾向的一种可靠依据, 由此可预测选举结果）
n. mechanical device attached to an elevated structure; rotates freely to show the direction of the wind
weathervane的用法和例句：
1.The hepcopter suddenly weathervaned into the wind, and your brother was not strapped in yet.
直升机突然卷到了风里 你哥哥还没扣好安全带