最好是在阅读的文章里面理解。

比如，cull这个词，单纯硬记很难记住。如果在例句中，就容易记住了。

In 2022 alone, more than 131 million poultry worldwide died or were culled on affected farms, according to the World Health Organization.

cull的英文释义是：select from a large quantity; obtain from a variety of sources.

关键词是select和large quantity。

农场主（从一大群鸡里）挑出（病鸡），挑出来又怎么样了？宰了