fluctuate
v[I, Ipr]
~ (between A and B)
1 (of a price, number, rate, etc) rise and fall; change irregularly (指价格、 数量、 比率、 费用等)涨落, 波动
The price fluctuates between 5 and 6. 价格在5英镑与6英镑之间波动.
2 (of an attitude or a state) change continually and irregularly; waver (指态度或状态)变化不定, 动摇
fluctuating opinions 变化不定的意见.
Yes, I see. How can they get rid of waste water in this way? What a terrible colour the sea is now! It looks as if our class won't be able to bathe at all.
是的,我看见了。他们怎么能这样排放废水呢?海水的颜色多么可怕呀!看来我们班同学根本不能在这里游泳。
In the evenings he studied hard for his exams, and most mornings he took tourists around Oxford.
他晚间努力学习,以应付考试,而大多数早上,他则带领游客在牛津大学参观。
People change, but they don't suddenly chnge from being right-handed to being left-handed.