tree of southeastern Asia to Australia grown primarily for its sweet edible fruit resembling litchi nuts; sometimes placed in genera Euphorbia or Nephelium
longan的用法和樣例：
例句
用作名詞 (n.)
Longan is a small white fruit, and it grows in Southeast Asia only. 龍眼是一種小型白色的水果，而且它只生長在東南亞。
They want to dry the longan so the storage period will be longer. 他們想把龍眼晒乾以有更長的保質期。
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