近年來，美國頻現(xiàn)異常天氣，讓人看著心驚肉跳。前些時(shí)候，華盛頓州以及俄勒岡州還下了一場(chǎng)奇怪的“牛奶雨”(milky rain)。于是，科學(xué)家紛紛展開研究，就其原因一探究竟。

Scientists from two laboratories plan to conduct tests of unusual precipitation that fell across the region in hopes of pinpointing the origins of so-called "milky rain" that has mystified residents.
來自兩家實(shí)驗(yàn)室的科學(xué)家計(jì)劃，化驗(yàn)西北地區(qū)降下的不同尋常的、令居民感到困惑的所謂“牛奶雨”的沉淀物，希望準(zhǔn)確地找出其來源。

Officials at both the Pacific Northwest National Laboratory and the Benton Clean Air Agency, both in Washington state, said they had collected samples of the rain, which left a powdery residue on cars across a wide swath of two states.
位于華盛頓州的美國西北太平洋國家實(shí)驗(yàn)室和本頓清潔空氣機(jī)構(gòu)的官員稱，已采集了“牛奶雨”的樣本。這種雨水給兩個(gè)州很多地區(qū)的汽車上蒙上一層粉末狀殘留物。

Scientists at the Pacific Northwest Nationallab said they believe the rain may have carried volcanic ash from an erupting volcano in Japan, while Benton Clean Air said its staffers believe dust from central Oregon was the culprit.
西北太平洋國家實(shí)驗(yàn)室的科學(xué)家們稱，他們認(rèn)為“牛奶雨”可能來自日本一座火山噴發(fā)出的火山灰。本頓清潔空氣機(jī)構(gòu)則表示，他們的科學(xué)家認(rèn)為，俄勒岡州中部地區(qū)的灰塵是罪魁禍?zhǔn)住?/p>

Wherever the milky precipitation came from, officials say they do not believe it poses any health risk. Air monitoring stations did not detect anything unusual while the milky rain was falling, said executive director of Benton Clean Air.
不管“牛奶雨”來自何方，官員稱，他們認(rèn)為它不具有任何危及健康的風(fēng)險(xiǎn)。本頓清潔空氣機(jī)構(gòu)的常務(wù)董事稱，在“牛奶雨”降下時(shí)，空氣監(jiān)測(cè)站并未監(jiān)測(cè)到任何異常。

（中國日?qǐng)?bào)網(wǎng)英語點(diǎn)津 丁一）