day length
日照时数
日照时间
光照长度
日长度
光周期
光照
日长
白昼长
response to day length and temperature
short day length treatment
Day - to - day variability in 5_q
day to day site supervision
Earth Day [first Earth Day in 1970]
First day and last day of maximum temperature
anchorage length and lap length
ratio of pulse length to the total cycle length
span length of length bar
0℃ critical temperature
10℃ Critical temperature