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光周期 guāngzhōuqī
anim.husb. light rhythm
desert. light-rhythm
oil photoperiod
repr.biol. light period
光周期
: 67 phrases in 15 subjects
Agriculture19
Animal husbandry1
Aviation1
Botany2
Chemistry1
Desert science2
Electronics2
General3
Life sciences1
Metallurgy1
Polymers1
Reproductive biology2
Research and development1
Space1
Technology29