A 20 foot-by-12-foot cell at the prison is filled with 29 boys, 13 of whom sleep on the concrete floor because there are not enough bunks.是什么意思_A 20 foot-by-12-foot cell at the prison is filled with 29 boys, 13 of whom sleep on the concrete floor because there are not enough bunks.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句