资讯

BBC7 个月
Day and night
The other half is in darkness until the planet turns around. That’s why we have day and night! SEYMOUR: The Sun keeps us warm too, right? ROSIE: That’s right! The Sun is a HUGE ball of gas ...
BBC2 年
What is day and night?
The other half is in darkness until the planet turns around. That’s why we have day and night! SEYMOUR: The Sun keeps us warm too, right? ROSIE: That’s right! The Sun is a HUGE ball of gas ...