字神帝國英語天地

今日主題：House Dust Organisms Reveal Location and Residents  房間內的塵土暴露你的行踪

洪欣老師推薦：托福聽力最好的課外教材：60-Second Science
康康精選托福會考的主題，堅持每天精聽一定會進步的哦!!

建議方法：
1. 先聽兩三遍 (不看文稿)
2. 再一句一句聽寫 (每句都要聽寫數遍，直到寫出85%以上的字)
3. 最後check文稿，看哪聽不出來，單字沒背過，還是發音不熟。
4. 堅持天天聽，就能每天進步哦。

MP3音檔 (按右鍵可下載聽)：喜歡的同學，幫忙推或按讚哦~~
http://online1.tingclass.net/voaspe/…/20151008sa_science.mp3

只有音檔怎夠，聽不懂地方，不用怕，康康幫你準備好中英文稿了：

中英文稿：
The dust that accumulates in the corners of your house does more than just cause allergies and aggravation—it’s also teeming with clues about where you live and who you live with. That’s the finding of a study in the Proceedings of the Royal Society B. [Albert Barberán et al, The ecology of microscopic life in household dust]
Researchers had volunteers at nearly 1,200 homes across the U.S. collect indoor and outdoor dust samples. The average home’s dust contains about 5,000 types of bacteria and 2,000 types of fungi.
房間的角落裡積攢的灰塵可不止引起過敏反應和病情惡化，它還能為識別居住地和居住者提供不少線索。這是近期發表在《英國皇家學會學報》 （Proceedings of the Royal Society B）上的一項研究成果（Albert

Barberán et al, The ecology of microscopic life in household dust）。研究者們採集了美國近1200戶志願者家庭室內及室外的灰塵樣本，結果顯示，每戶家庭的灰塵中平均含有5000種細菌和2000種真菌。
The fungi gave away a lot about a home’s location. Different regions have different fungal populations, and thus so do houses within those regions. For example, dwellings around the Great Lakes had very different fungi than did homes in Arizona—because most household fungi originate outside and come in either on people’s clothes or through windows and doors.
這些灰塵中的真菌能夠洩露不少關於家庭住址的秘密。不同的真菌種群通常分佈在不同的地區，因而我們能夠通過分析真菌種群判斷出住戶所在的地區。例如，五大 湖地區（the Great Lakes）和亞利桑那州（Arizona）居民家中的真菌就大不相同——因為大部分的家庭真菌都是靠沾染在人們的衣物上或通過門窗由室外進入室內的。

As for the bacteria, those were strong indicators of the identity of the home’s residents. Much of the bacteria was shed by the human body and was a pretty good indicator of a home’s gender ratio. The single-celled organisms also showed whether a pet shared the home—cats and dogs make their own contributions to the indoor bacterial menagerie.
而細菌則是鑒別房客的有力助手。多數細菌都是由人體散落而來，因而很容易判斷出一個家庭的性別比例。這種單細胞生物還能鑒別出家裡是否養了寵物——貓貓狗狗們也會帶有專屬於它們的細菌類別。

The research could inform forensic investigations and allergy studies.
該研究成果也可以為司法鑒定及過敏研究提供更多線索。

In the meantime, what can we take from these findings? Well, you can clean up dust but you can’t change its composition. That is, unless you move. Or make some changes in the pets and people you live with.
與此同時，我們還能從中瞭解些什麼呢？你或許能打掃乾淨灰塵，但卻不可能改變它的組成。也就是說，只有當我們移居或是家庭成員發生變化時，家庭灰塵中的真菌和細菌才會隨之發生變化。