專心致志的英文：[Literal Meaning]
concentrate/attention/devote to/interest
to devote oneself to something
[解釋]一心一意，專心地做一件事。
[Explanation]
to give complete attention to
[例子]看孩子在專心致志地學習，父親決定不打擾他。
[Example]
Seeing his child was studying with great presence of mind, the father decided not to disturb him.
[英文等價詞]apply
bone
put one's back into it
with great presence of mind
參考例句：
Concentrate on one thing.
請專心致志於一件事上。
He is wrapped up in his work.
他專心致志地工作。
He is bent on linguistic studies.
他專心致志於語言學研究工作。
He is bound up in his studies.
他專心致志於學習。
He is intent on his studies.
他專心致志地學習。
Engrossed herself in her reading
專心致志地讀書
Be intent on one's studies
專心致志地學習
She is bending her mind to the research work
她在專心致志地從事研究工作。
He was involved in working out a plan
他專心致志地制訂計劃。
You will only pass your exams if you really apply yourself.
你只有真正專心致志，考試才能及格。
