Nrao
abbr. National Radio Astronomical Observatory 国家射电天文台; National Radio Astronomy Observatory 国立射电天文台（美国国家科学基金会）
🗣️ 情景例句
Do you?
你会吗？
Strong packing will protect the goods from any possible damage during transit.
坚固的包装可以防止货物在运输途中受到任何损失。
as the wave leaves the particles behind back to its starting point again.
当波浪把微粒留在身后时又回到出发点。