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??
The older a man is, the more mature he becomes. Lao Zhang is older than his son, so Lao Zhang is more mature than his son