plug away
顽强地致力于
例句与用法：
He has been plugging away at that article, for hours.
他已坚持了好几个小时写那篇文章。
She's been plugging away at her French lessons for months.
她已刻苦攻读法语数月。
词形变化：
名词: plugger |
动词过去式: plugged |
动词过去分词: plugged |
动词现在分词: plugging |
动词第三人称单数: plugs |