Most antennas are made in the shape of a dish to collect and reflect the radio waves to the sub reflector, in the same way as a curved mirror focuses visible light to one point.
大多数天线被制成碟形，用以收集和反射无线电波至亚反射器，就像曲面镜将可见光聚焦于一点一样。
Slang, a mirror of sub-culture, is an indispensible part of English language.
俚语是英语语言中举足轻重的一支，它是亚文化的语言载体。
Slang, a mirror of sub-culture, is an indispensible part of English language.
俚语是英语语言中举足轻重的一支，它是亚文化的语言载体。
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