to keep moving from one position to another and back again 摆动；振动◆The cylinder oscillates to mix the liquids. 气缸振动以混合液体。
to keep changing from one level or value to another and back again 波动；变化◆The dollar has been oscillating between 107 and 110 yen. 美元一直在 107 至 110 日元之间波动。SYNswing
▸oscillation /ˌɒsɪˈleɪʃn; NAmEˌɑːs-/
noun
[] ◆the economy's oscillation between growth and recession 经济在增长和衰退之间的波动