This is the 1926th most frequent Chinese word.
常见
"Common" or "frequently seen."
The word '常见' is used here as an adjective to describe the phenomenon as something frequently observed during summer.
这种现象在夏季很常见。
This phenomenon is very common in summer.
In this sentence, '常见' modifies the noun '问题', indicating a problem frequently encountered in daily life.
这是生活中一个常见的问题。
This is a common problem in life.
Here, '常见的' is used as an attributive adjective qualifying '种类', referring to species that are commonly observed or recognized.