marcel waver

例句：

1. 1.The waves were so strong that they couldbarely keep their balance.
   海浪如此汹涌，以至于他们几乎无法保持平衡。
2. 2. He was wavering between two choices, unsure of whichone to choose.
   他在两个选择之间犹豫不决，不确定该选哪一个。