她的头发是棕黄色的，随着她上下摇摆。
过去3年中，雅虎股票围绕着15美元上下摇摆，其中大部分价值都投到了亚洲资产中，而美国人对其亚洲资产知之甚少。
The stock itself has vacillated around the $15 mark for the last three years. A lot of the value is tied up in Asian assets that few Americans know anything about.
这种形式的舞动，属于驻波舞动。导线舞动时作周期性上下摇摆，其频率低振幅高而且能量大，有较强的破坏作用。
When the galloping occure, the transmission line vibrates up and down with low frequency, high amplitude and a great amount of energy, which causes great damage to the transmission line.
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