This might sound unappealing, but nightingale droppings have long been used in Japan to clear sunspots, acne marks and pigmentation.
这听起来可能没什么吸引力，但夜莺粪便长期以来在日本被用来清除祛斑、痤疮和色素沉着。
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Attracting numbers of birds continually to the same spot can be harmful to them, particularly species that pick food from the ground contaminated by the droppings of other birds.