比较级是more common，中文意思是更普通的，更常见的

Melanomas are more common if you have periodic intense exposure to the sun.如果你定期暴露在强烈的阳光照射下，黑色素瘤会更常见。

Smartphones and e-readers have become more common in recent years.

近年来，智能手机和电子阅读器变得越来越普遍。