杜 (woods, grove)

チャンネル間隔かんかくが密みつの波長はちょう多重化たじゅうかチャンネルを既存きそんの杜撰ずさんなフィルタを用もちいるにも拘かかわらず漏話ろうわ無なしに確実かくじつに分離ぶんりする。

To reliably separate densely spaced wavelength-multiplexed channels without crosstalk despite using an existing crude filter.

このとき残した「安禅必ずしも山水を用いず、心頭滅却すれば火も亦た涼し」の辞世で知られる（杜荀鶴の原典は「…火も自ずから涼し」）。

Joki has been famous for his farewell poem (composed before his death), saying "Meditation does not always require a quiet place. If you have established your own philosophy, nothing will trouble you as if you would feel fire cool.

そして、どう見ても杜撰な、荒唐無稽な作品である『雨月物語』を書いた自分は、そんなひどい目にあうわけがない、と謙遜している、ように見える。

And he wrote that an author who wrote "Ugetsu Monogatari," which was imperfect and absurd, wouldn't have such a terrible experience, pretending to be humble.