A single thread can't make a cord nor a single tree a forest. ; One flower makes no garland. ; One strand of silk doesn't make a thread ; one tree doesn't make a forest.
单丝不成线， 独木不成林。
One strand of silk doesn't make a thread; one tree doesn't make a forest.
《新英汉大辞典》
单丝不成线，独木不成林。
Monofilament is not a line, makes no garland.
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