1) He was plugging away at his work.
他正在埋头苦干。
2) He cloistered himself away with his books
他只顾埋头苦读。
4) They are plodding on.
他们在闷头干活。
5) They were throwing stones.
他们正在掷石头。
6) work silently without publicity
埋头干活
补充资料：埋头
1.形容专心致志。 2.不出名;无官职。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条