focus
要点焦点、焦点を合わせる
意味
- 焦点
- 焦点距離(focal length)
- 焦点整合,ピント
- (活動・興味・重要性などの)焦点,中心
- (楕円・放物線・双曲線などの)焦点
- 震源[地]
- (…に)〈レンズなど〉の焦点を合わせる《+名+on+名》
- (…に)〈注意など〉を集中する《+名+on+名(doing)》
- (…に)〈レンズなどの〉焦点が合う;〈注意などが〉集まる《+on+名》
例文
I believe that people tend to focus on the bad.
人は悪い事に目を向けがちだと思います。
Don't look out the window, focus on your studies.
窓から外を見るな。勉強に集中しなさい。
She was not really focused on what he was saying.
彼女は彼の話にあまり集中していなかった。
語源
英語の原文（Wiktionary）
Borrowed from Latin focus (“hearth, fireplace”); see there for more. Related to fuel. Kepler introduced the term into mathematics and the sciences in describing elliptical orbits of planets (quote from Nicholas Mee): "One of the interesting properties of an ellipse is that if there were a light bulb at one focus, then all the light that it emits would reflect off the ellipse and converge at the other focus. This is why Kepler originally used the name focus for these points."