see-saw

v [I] 1 play on a see-saw 玩跷跷板. 2 (a) move up and down or to and fro 上下或往复移动: a branch see-sawing in the wind 随风摇曳的树枝. (b) (fig 比喻) rise and fall in turn, or move from one position, opinion, etc to another repeatedly 反覆升降; 反覆改变位置、 意见等: Prices see-saw according to demand. 物价随需求变化而反覆涨跌. * public opinion see-sawing continuously 不断变来变去的舆论.

see eye to eye, see for oneself, see no need for, see off, see over sth, see sb off, see sb through (sth), see sb. do sth., see sb. doing sth., see sb. off, see sb. through, see sth in sb/sth, see sth out, see that, see the world, see through, see through sb/sth, see to, see to sth, see with, seed, seed capsule, seed-bed, seed-cake, seed-pearl, seediness, seedless, seedling, seedsman, seedy, seeing, seeing that, seek, seek after, seek out, seek to, seem, seem to (do), seem to be, seeming,