美国科学60秒 SSS 2013-07-16_在线英语听力室_免费在线英语听力学习网站

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　　This is Scientific America 60-Second Science, I'm Santy Criber. This will just take a minute.

　　It's boating season, which means it'll soon be time for the annoying ritual, scraping of the barnacles.They lache on tide and don't let go, barnacles can be a major pain, as they grow they built calcium¹ deposits under a bolts paint.Their interference with smooth fluid flow can decrease fuel effiency up to 40%, a major problem for larger vessels². Currently, whole paint can be dote with poison, usually based on carbon oxide³ that let it kill the little critters but the poison also escapes into the water and can kill other marine⁴ life. Now researchers might have a better option a paint addititive that kills just the barnacles using their own behavior against them. A toxic⁵ based on molecule-created bacteria. The researchers developed a method of embedding⁶ that toxic into the paint so that it only gets released when the barnacles penetrates⁷ the paint. The finding is published in an university thesis. The scientists determined⁸ that toxic was low concentrations, and could be effective for years, which could lower the cost of paying the barnacle bill.

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1 calcium
n.钙(化学符号Ca)
参考例句：
We need calcium to make bones.我们需要钙来壮骨。 Calcium is found most abundantly in milk.奶含钙最丰富。

2 vessels
n.血管( vessel的名词复数 )；船；容器；（具有特殊品质或接受特殊品质的）人
参考例句：
The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。来自《简明英汉词典》 All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。来自《现代汉英综合大词典》

3 oxide
n.氧化物
参考例句：
Oxide is usually seen in our daily life.在我们的日常生活中氧化物很常见。 How can you get rid of this oxide coating?你们该怎样除去这些氧化皮？

4 marine
adj.海的；海生的；航海的；海事的；n.水兵
参考例句：
Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。 When the war broke out,he volunteered for the Marine Corps.战争爆发时，他自愿参加了海军陆战队。

5 toxic
adj.有毒的，因中毒引起的
参考例句：
The factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。 There is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。

6 embedding
把…嵌入，埋入( embed的现在分词 )；植入；埋置；包埋
参考例句：
Data embedding in scrambled Digital video complete source code, has been tested. 数据嵌入在炒数字视频完整的源代码，已经过测试。 Embedding large portions of C++ code in string literals is very awkward. 将大部分C++代码嵌入到字符串中是非常笨拙的。

7 penetrates
v.穿过( penetrate的第三人称单数 )；刺入；了解；渗透
参考例句：
This is a telescope that penetrates to the remote parts of the universe. 这是一架能看到宇宙中遥远地方的望远镜。来自《简明英汉词典》 The dust is so fine that it easily penetrates all the buildings. 尘土极细，能极轻易地钻入一切建筑物。来自辞典例句

8 determined
adj.坚定的；有决心的
参考例句：
I have determined on going to Tibet after graduation.我已决定毕业后去西藏。 He determined to view the rooms behind the office.他决定查看一下办公室后面的房间。