在这个西非洲湖泊的表面下潜藏着一个无声的杀手。
A silent killer lurks beneath the surface of this West African lake.
高血压被称之为“无声的杀手”，因为发现它的唯一方法就是检测血压。
It's called the "silent killer" because the only way to find out if your pressure is high is to check it.
他们已经压缩和解，通过你的身体每一秒，他们可能最终会被我们无声的杀手。
They are already zipping through your body every second, and they could end up being our silent killers.
虽然空气污染和化学物质被确认为是主要的威胁，但我们的分析认定，旅游业也是一个无声的杀手。
While air pollution and chemicals are believed to pose a major threat, our analysis determined that tourism served as the silent killer.
了解并控制血压：高血压通常被称为“无声杀手”，因为它没有任何的警示信号和患病症状。
KNOW AND CONTROL blood pressure: High blood pressure is often called a "silent killer" because it has no warning signs or symptoms.
了解并控制血压：高血压通常被称为“无声杀手”，因为它没有任何的警示信号和患病症状。
KNOW AND CONTROL blood pressure: High blood pressure is often called a "silent killer" because it has no warning signs or symptoms.
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