The gateway design is two arches crossing the freeway, similar to that of the atomic symbols. These two arches frame the inner ball, perhaps a neutron or proton.是什么意思_The gateway design is two arches crossing the freeway, similar to that of the atomic symbols. These two arches frame the inner ball, perhaps a neutron or proton.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句