Cepheid variable stars are stars whose brightness changes at regular periods.造父变星是一种光线按规律周期发生变化的恒星.His first great discovery was made when he recognized a Cepheid variable star.他的首次重大发现产生于他认识了一颗造父变星的时候....
The council is considering whether to approve of the use of firearms.政务委员会正在考虑是否要批准动用武器。Her parents did not approve of her decision.父母不赞成她的决定。I didn't approve of his manner.我不喜欢他的态度。...
你可以一次付清或先付最低分期偿付款。You can pay it off or make a minimum repayment.会费完全付清的会员a fully paid-up member你如果不对他硬点,他是决不会把钱付清的.He'll never pay up unless you get tough with him....
They hauled feedlot manure from the ranches to fertilize their fields.他们从牧场的饲养场拖走肥料去肥田.Many abandoned ranches are purchased or leased by other poultrymen.许多被放弃的牧场会由其他家禽监主收买或租用.After the harvest, the ranches seemed asleep...