1) day length
白昼长
2) Daylength
白昼长度
1.
Influence of Climate and Daylength on the Activity Budgets of Feral Goats (Capra hircus) on the Isle of Rum, Scotland;
气候与白昼长度变化对苏格兰拉姆岛上野化山羊种群日活动节律的影响(英文)
3) The days are getting longer in summer.
夏天白昼变长了。
4) growth and decay trend
昼夜消长
1.
Investigation of Aedes vexans growth and decay trend in day and night in Beiwan frontier of Xinjiang;
新疆北湾边境地区刺扰伊蚊种群昼夜消长调查
6) In summer the days are long.
夏季昼长。
补充资料：白昼
1.白天。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条