The past several years have witnessed a social phenomenon that …

The past several years have witnessed a social phenomenon that an increasing number of people are overfishing ocean resources, including fish, shell and the like.

The past several years have witnessed the profund influence of mobile-phones on interpersonal communication.

The past several years have witnessed a social phenomenon that the traditional culture is more or less underestimated or ignored.

The past several years have witnessed a social phenomenon that the civic fitness area is very popular,attracting people of all ages to come here for leisure or exercise.

The past century has witnessed a dramatic change of ……

The past two decades have witnessed a dramatic change of information technology.

There is a growing national awareness of … There is a growing natioanl awareness of the importance of … There is a growing national awareness of the importance and the detriment of … There is a growing national awareness of the pros and cons of … There is a growing national awareenss of the detriment of …

There is a growing worldwide awareness of the importance of the good habits.

There is a growing worldwide awareness of strong will and persistent effort.

There is a growing worldwide awareness of the importance of physical and mental health.

There is a growing national awareness of the detriment of environmental pollution caused by a wide variety of tourists,regardless of age and gender.

There is a growing worldwide awareness of the importance and detriment of mobile-phones in both developed coutries and developing ones.

There is a growing worldwide concern of the detriment of rapid development of economy.

There is a growing global concern of the possible problems that artificial intelligence will bring.

In no country other than …, it has been said, is the problem of … more serious.

In no country other than China, it has been said, is the problem of supporting the elderly more serious.

In no country other than Unitied States, it has been said, is the problem of species extinction more serious.

In no place other than urban cities, it has been said, is the problem of “phubbing” among the youngsters more serious.

In no area other than the developing countries, it has been said, is the problem of industrial pollution more severe.