seesaw

英 [ˈsiː sɔː , ˈsiːsɔː]

美 [ˈsiː sɔː , ˈsiːsɔː]

adv.  上下动地[的]; 前后动地[的]; 交互地[的]; 拉锯性地[的]
n.  动摇; 跷跷板(戏); 上下动; 前后动
v.  交替; 涨落; 动摇; (温度等)升降

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

BNC.42392 / COCA.22793

柯林斯词典

N-COUNT 跷跷板
Aseesawis a long board which is balanced on a fixed part in the middle. To play on it, a child sits on each end, and when one end goes up, the other goes down.
1. There was a sandpit, a seesaw and a swing in the playground.
  游乐场上有一处沙坑、一块跷跷板和一个秋千架。
ADJ 来回往复的;拉锯式的
In aseesawsituation, something continually changes from one state to another and back again.
1. ...a seesaw price situation.
  价格来回波动
2. ...the seesaw way of politics.
  政治上的拉锯战
3. Seesawis also a noun.
4. Marriage, however, is an emotional seesaw.
  然而婚姻是一块感情跷跷板。
VERB (感情或某种局面)摇摆不定，不断反复，来回波动
If someone's emotionssee-saw, or a particular situationseesaws, they continually change from one state to another and back again.
1. The Tokyo stock market seesawed up and down.
  东京股市涨落不定。

noun

a plaything consisting of a board balanced on a fulcrum
Synonym:teeterteeter-totterteetertotterteeterboardtilting boarddandle board

verb