headout 與 headoff 用法的區(qū)別是什么

head out:前往,啟程,出發(fā),到達(dá),長(zhǎng)出頭狀物,頭向外例句：I have a long way to go before dark．I'm going to head out．天黑之前我還要走一大段路程，我得上路了。head off:攔截,改變?cè)掝},回避,趕在別人之前到達(dá)例句：The thief realized that the police were following him，but he succeeded in heading them off at the junction．小偷發(fā)現(xiàn)**在跟蹤他，可是他在十字路口把他們甩掉了。