The NTSB says the wing of that seaplane that crashed off Miami had cracks in the main support beam that probably went unseen for a long time.是什么意思_The NTSB says the wing of that seaplane that crashed off Miami had cracks in the main support beam that probably went unseen for a long time.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句