一叶知秋

Explanation: Leaves from a litter, that the arrival of autumn. Subtle metaphor for individual signs, you can see the whole situation and development trend of the results. 　　Usage: Contraction type; as attributive; refers to extrapolate the future from the local 　　Source: "Huai said mountain training," see a leaves were gone with knowledge of the twilight years of age. "Song Tang G," paper record "drawing the number of Chinese poems Shanseng understand six decades, a world known autumn leaves were gone." Thesaurus:  Defoliate Zhiqiu, 1 leaves were gone and To know land autumn