- 天长日久 tiānchángrìjiǔ after a long timeafter a long time has passed; over a long period of time
- 长日照动物 chángrìzhàodòngwù long-day animalAn animal that enters its breeding season or mating period during the spring as the hours of daylight gradually increase
- 长日照植物 chángrìzhàozhíwù long-day plantA plant that only flowers when the daily period of light is longer than a certain threshold, usually more than 12 hours.
