I was too much of a good-time girl to do any serious studying.

我过去是个很贪玩的女孩，从来不知道认真学习。

《牛津词典》

Two main reasons can cause poor eyesight: too much time spent indoors studying and too little time spent outdoors playing.

导致视力下降的主要原因有两个：花在室内学习的时间太多，花在户外玩耍的时间太少。

youdao

Molly: You are working too much and studying too little.

莫莉：你工作的时间太多而学习的时间太少。

youdao

Stefan Duma, a Virginia Tech professor who is studying the issue, said it would be "incorrect" to rely too much on small pools of brain donors whose families may have suspected there was something amiss.

WSJ: Super Bowl XLVII: The Football Nanny State

Second, because they spend too much time trying to gain access to government incentives, would-be entrepreneurs spend too little time in studying the market for new products that will ultimately determine the success or the failure of the company.

FORBES: Connect

Second, because they spend too much time trying to gain access to government incentives, would-be entrepreneurs spend too little time in studying the market for the new product that will ultimately determine the success or the failure of the product.

FORBES: Why China Has Yet To Develop Winning Industries