(proverb)something of small or modest proportions may grow into something very large or impressive
(諺)小小橡實可能長成參天大樹
(Brit.)(in certain universities) shut the outer door of one's room as a sign that one does not wish to be disturbed
(英)（某些大學中）閉門謝客（指將房門關(guān)住表示希望免受打擾）