专注的英文单词是"concentration"。它来自拉丁语的"concentratio"，意思是集中注意力。

例句：

He had to focus all his concentration on the task at hand. 他必须把全部注意力集中在眼前的任务上。

She found it difficult to maintain her concentration during the long lecture. 她发现在漫长的演讲中保持专注是很困难的。

His concentration was broken by the sound of the door opening. 他的专注力被门开启的声音打断了。

The meditation exercise was designed to improve concentration and focus. 这个冥想练习旨在提高专注力和注意力集中能力。