PTE考生目前最大的问题之一就是练习题缺乏。除了有限的基本官方书（PLUS，Testbuilder, OG）之外就没有题
了。很多英语基础不是很扎实的同学很难找到练习材料。悉尼文波雅思PTE培训学校专门为澳洲，尤其是悉尼、墨尔本的PTE考生准备了适合PTE听力阅读练习的科学60秒。各位PTE同学可以练习PTE听力中的summarise spoken text和PTE口语中的retell lecture，PTE听力口语-科学60秒-Frosty Moss练习记笔记技巧和复述。下面开始：
听力内容：
60秒科学节目（SSS）是科学美国人网站的一套广播栏目，英文名称：Scientific American – 60 Second Science,节目内容以科学报道为主，节目仅一分钟的时间，主要对当今的科学技术新发展作以简明、通俗的介绍，对于科学的发展如何影响人们的生活环境、健康状况及科学技术，提供了大量简明易懂的阐释。
下面是墨尔本悉尼文波PTE雅思培训学校为大家整理的原文材料：
The Chesapeake Bay could get helped by a newantipollution expert: farmed oysters. For decades, the Chesapeake has been plagued by excessnutrients, such as nitrogen, from agricultural andmunicipal runoff. The nutrients feed algal blooms, which suck up the oxygen in the water. And those oxygen–poor waters no longer support the Bay’s rich biodiversity.
The Chesapeake used to be home to wild oysters, but 99 percent of them are gone. The tastybivalves are known for removing excess phytoplankton from water and sequesteringnutrients in their shells and flesh. So scientists from Virginia Commonwealth Universitymeasured the nutrient–chomping potential of the Eastern oyster Crassostrea virginica.
They tested dried tissue and shells from oysters in two aqua–culture sites. Turns out that if afarmed oyster grows to 76 millimeters, it’s a pretty effective water filter. Eight large–scaleoyster farms could clean a ton of nitrogen from the Chesapeake. The study was published inthe Journal of Environmental Quality. [Colleen Higgins, Kurt Stephenson and Bonnie Brown, “Nutrient Bioassimilation Capacity of Aquacultured Oysters: Quantification of an EcosystemService“]
Such farming won’t make the bay pristine again, but the researchers say the oysters areeffective at cleaning the area where they’re grown. And so for a biologically betterChesapeake, pass the hot sauce.
—Cynthia Graber
文波陪伴，PTE不难！
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