“全神贯注于”常见的英文表达有 be absorbed in、be concentrated on、be focused on 或 be engrossed in 等。以下为具体用法及例句：
1、 be absorbed in
* 含义：完全沉浸在、全神贯注于某事，强调注意力高度集中，几乎到了忘我的境界。
* 例句：She was so absorbed in her book that she didn't hear the phone ring.（她如此全神贯注地看书，以至于没听到电话响。）
2、 be concentrated on
* 含义：集中精力在某事上，强调注意力或精力的集中。
* 例句：All his thoughts were concentrated on the upcoming exam.（他所有的思绪都集中在即将到来的考试上。）
3、 be focused on
* 含义：专注于某事，强调目标或注意力的明确指向。
* 例句：To succeed in business, you need to be focused on your goals.（要想在商业上取得成功，你需要专注于你的目标。）
4、 be engrossed in
* 含义：全神贯注于，与“be absorbed in”意思相近，但使用频率相对较低。
* 例句：He was engrossed in his work and didn't notice the time passing.（他全神贯注于工作，没有注意到时间的流逝。）