The older a tree is, the more its rings are. The locust trees in Lao Zhang's yard are older than those in Lao Li's house. Therefore, the locust trees in Lao Zhang's house have more rings than those in Lao Li's house.
most similar to the problem stem??
This year's marathon champion's performance is better than the year before last. Zhang Hua is this year's marathon champion, so his marathon performance this year is better than that of the year before last