While this showed astronomers that Venus was surrounded by a thick layer of gases refracting sunlight around it, both effects made it impossible to obtain accurate timings.

尽管这向天文学家证明了金星被一层厚厚的气体所包围，这层气体使太阳光在金星周围发生折射，但这两种效应都使精确的时间控制成为不可能。

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UNIX is built around a small kernel that is surrounded by successive layers of functionality.

UNIX的构建中心是一个小的内核，周围是连续的功能层。

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But it has a mass about 20 times that of our sun and is surrounded by a disk of material similar to what is found around smaller, growing stars.

但是它的规模大约是我们的太阳的20倍，而且环绕着一个碟状尘埃，尘埃的材料与成长中的小星体周围的碟状尘埃相似。

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Out back, a brick wrap-around patio leads to a sunken pool surrounded by mature foliage.

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One man, identified as Syrian, was quickly surrounded, pushed around and screamed at by a mob of locals.

BBC: Middle East

As they converged around him, a cordon of policemen headed them off and surrounded the young Jewish boy who refused to be intimidated.

CENTERFORSECURITYPOLICY: Israel's daunting task