An iron bar, for example, whose ordinary length is 6 feet becomes about, 1/2 inch longer when it is made red-hot.是什么意思_An iron bar, for example, whose ordinary length is 6 feet becomes about, 1/2 inch longer when it is made red-hot.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句