one falling leaf is indicative of the coming of autumn.; one leaf's falling tells the coming of autumn.; when the leaves fall, we know that autumn is here
秋: 名词1.(秋季) autumn; [美国] fall 短语和例子秋风 autumn wind; 深秋 late autumn; 在初秋 in early autumn; 在一九九二年秋 in the fall of 19922.(庄稼成熟时节) harvest time 短语和例子麦秋 time for the wheat harvest3.(一年的时间) year 短语和
知: Ⅰ动词1.(知道) know; realize; be aware of 短语和例子强不知以为知 pretend to know what one doesn't know; 无所不知 know everything; omniscient; 知其然并力求知其所以然 know the how and endeavour to know the why; 若要人不知; 除非己
