更多photoperiod例句

1. Broad limits to functional reproductive activity seem to be set by the photoperiod—neuroendocrine system.
2. These captives had been kept for several months at a temperature of 21 degrees Centigrade, and on a daily photoperiod of 15 hours.
3. The mice were kept in a room in which temperature and photoperiod were controlled.
4. In general, Tb's showed a marked circadian cycle in phase with photoperiod.