What can bring a good effect.
Do not experience the wind and rain, how can see the rainbow.
What can bring bad influence.
We should form the habit of getting up early.
This issue has attracted wide attention.
This view is now being questioned by more and more people.
Always bear in mind that there is always a better acquaintance than no acquaintance.
The mechanism by which brain cells store memories is not clearly understood.
There is no doubt that the increase in demand leads to the rise in prices.
In recent years, the problem of international tourism has caused wide attention.