請在英文狀態(tài)下輸入標點符號

HINTS：- Henry David Thoreau
???????? ?Walden Pond

??????????Woodchoppers and the Iron Horse

???????????“when idleness was the most attractive and productive business.”

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“I was rich, if not in money, in sunny hours and summer days." - Henry David Thoreau When Thoreau wrote that line, he was thinking of the Walden Pond he knew as a boy. Woodchoppers and the Iron Horse had not yet greatly damaged the beauty of its setting. A boy could go to the pond and lie on his back against the seat of a boat, lazily drifting from shore to shore while the loons dived and the swallows dipped around him. Thoreau loved to recall such sunny hours and summer days “when idleness was the most attractive and productive business." I too was a boy in love with a pond, rich in sunny hours and summer days.