This site will be taken down March 31st, 2026.

This was not an easy decision to make. For the last couple years, I have been struggling to find motivation for this site and to keep up with basic maintenance and security updates. With the rise of AI and more sophisticated tools, the usefulness of sites like this is questionable and traffic has nose-dived. I just don't have it in me to keep doing this. Thank you all for 10 years of support!

Zach

Sentence

この種の汚染物質は主として自動車エンジンの燃焼から生まれる。

この(たね)汚染(おせん)物質(ぶっしつ)(しゅ)として自動車(じどうしゃ)エンジンの燃焼(ねんしょう)から()まれる。
Pollutants like this derive mainly from the combustion of fuel in car engines.
Sentence

一酸化炭素とは炭素化合物の不完全燃焼で発生する有害物質です。

一酸化(いっさんか)炭素(たんそ)とは炭素(たんそ)化合物(かごうぶつ)不完全(ふかんぜん)燃焼(ねんしょう)発生(はっせい)する有害(ゆうがい)物質(ぶっしつ)です。
Carbon monoxide is a poisonous substance formed by the incomplete combustion of carbon compounds.