VOA常速英語聽力：紐約大學科學家揭示白發(fā)成因

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VOA常速英語，以其地道的發(fā)音、豐富的時事內容，成為提升英語聽力與理解能力的關鍵途徑。它不僅讓全球聽眾即時了解世界動態(tài)，還促進了跨文化交流，對于英語學習者而言，是不可或缺的聽力訓練資源，對提升語言綜合能力至關重要。讓我們一起走進今天的VOA常速英語聽力練習：紐約大學科學家揭示白發(fā)成因。

英文原文

It's a hair miracle. Scientists at New York University believe they have identified the mechanisms that cause gray hair, offering hope to people who hate the evidence of aging but are leery of using chemical dyes as a cover up. This time-consuming and costly process of coloring hair could soon be a thing of the past. 

這是一個關于頭發(fā)的奇跡。紐約大學的科學家們認為，他們已經發(fā)現了導致頭發(fā)變白的機制，為那些討厭衰老跡象但又對使用化學染發(fā)劑遮掩持謹慎態(tài)度的人們帶來了希望。這種耗時且昂貴的染發(fā)過程可能很快就會成為過去式。

New research conducted by scientists at New York University has uncovered a mystery behind the grain of hair. These researchers say hair pigmentation is an active process involving stem cells that travel up and down the hair follicle to produce pigment. As people age, some of the stem cells stop making this journey and become stranded in a small pouch-like area near the top of the hair follicle. "We found that some of the stem cells are stuck in the part of the environment where they are not supposed to be," and in that place, "they are no longer able to access regeneration signals, so they don't participate in the generation of hair pigmentation." These stranded stem cells are thought to be responsible for the loss of pigment, leading to the appearance of gray or white hair. Scientists say this research could potentially lead to new treatments for gray hair.

紐約大學的科學家們開展的新研究揭示了頭發(fā)顏色背后的奧秘。這些研究人員表示，頭發(fā)的色素沉著是一個活躍的過程，涉及在毛囊中上下來回移動的干細胞以產生色素。隨著年齡的增長，一些干細胞停止這種移動，并滯留在毛囊頂部附近的一個小袋狀區(qū)域中。“我們發(fā)現，一些干細胞被困在了它們本不該在的環(huán)境部分中，”而在這個位置，“它們無法再接收到再生信號，因此無法參與頭發(fā)的色素沉著生成。”這些滯留的干細胞被認為是導致色素流失，進而出現灰發(fā)或白發(fā)的元兇。科學家們表示，這項研究可能會為治療白發(fā)帶來全新的治療方法。

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