There is some evidence that dishonesty may ebb and flow. When times are hard， incidents of theft and cheating usually go up. And when times get better such incidents tend to go down.

    Cheating in school also tends to ebb and flow. But it doesn't seem linked to the economy.

    Many educators feel that as students gain confidence in themselves and their abilities， they are less likely to cheat. Surprisingly， some efforts to prevent cheating may actually encourage cheating - a person may feel "they don't trust me anyway，" and be tempted to "beat the system." Distrust can be contagious. But， so can trust！

    PHEASES & EXPRESSIONS

    out of style

    no longer fashionable 过时的，不再流行

    according to

    as stated or shown by； in a way that agrees with 按照，根据

    （be） faced with

    面对

    be hard on

    对……过分严厉

    on the rise

    increasing steadily 在增长；在加剧

    a case in point

    a very good example  恰当的例子

    all but

    all except 除了……都

    （be） different from

    unlike， not the same as  与……不同

    think of …… as

    regard as

    in the case of

    就……来说，至于

    come to

    arrive at a particular state or position 变成（某种状态）

    lie in

    exist in 在于

    on the other hand

    from the opposed point of view 另一方面，反过来说

    at one's best

    in as good a state as possible 处于最佳状态

    go up

    rise； increase 上升；增加

    go down

    fall； decrease 下降；减少