Researchers in this field have made some important new discoveries. 这个领域的研究人员有了一些重大的`新发现。 Teachers are up against some major problems these days. 老师们最近面临着一些重大问题。 Digital television has been around for some time now. 数字电视已经面市一段时间了。 A solution is still some way off. 解决办法尚需时日。 Everyone experiences these problems at some time in their lives. 每个人在人生的某个阶段都会经历这些问题。 上一篇：滨州学院是几本好不好 下一篇：hd高清是什么意思 |