例句：
1、若是普通颜料就要涂两层。
If it were any ordinary paint you would need two coats.
2、荨麻是一种普通的野生植物。
Nettle is a kind of common wild plant.
3、普通的一天，普通的他们，说着普通的话。
The ordinary ones are saying ordinary words in an ordinary day.
4、他们能从普通物质中提取贵重药物。
They can abstract precious medicines from ordinary substances.
5、 但是现在不是普通时期。
But these are not ordinary times.