v.交替,涨落,动摇,(温度等)升降
seesaw的过去分词和过去式

原形：seesaw第三人称单数：seesaws复数：seesaws过去式：seesawed过去分词：seesawed现在分词：seesawing

The seesaw is a favorite playground toy for children.
秋千是孩子们最喜欢的游乐场玩具。
She balanced precariously on the seesaw, trying not to fall off.
她在秋千上小心翼翼地保持平衡，尽量不掉下来。
Their relationship was like a seesaw, with one person always having the upper hand.
他们的关系就像跷跷板，总是有一方占据主导。
The seesaw of emotions swung from joy to sorrow in a matter of seconds.
情绪的跷跷板在几秒钟内从欢乐转向悲伤。
The seesaw principle states that for every action, there is an equal and opposite reaction.
跷跷板原理指出，每一个动作都有一个等大但方向相反的反作用力。
Their financial situation has been a constant seesaw between feast and famine.
他们的经济状况一直在丰裕和贫困之间摇摆不定。
The negotiation process felt like a seesaw, with neither side willing to compromise.
谈判过程就像跷跷板，双方都不愿妥协。
The seesaw of political power in the region has shifted dramatically over the past decade.
过去十年里，该地区的政治权力格局发生了巨大变化。
The seesaw of supply and demand determines the price of goods in a free market.
供求关系的跷跷板决定了自由市场中商品的价格。
The balance of power in the league has been a seesaw battle between two dominant teams.
联赛中的力量平衡一直是两个主导球队之间的拉锯战。