这档新闻节目每周在黄金时段播出4次。The news programme goes out four times a week at peak time.在交通的晚高峰时段，这里通常被车辆堵得水泄不通。During the evening rush hour it was often solid with vehicles.话费在优惠时段为每分钟36便士，其他时段一律为每分钟48便士。Calls cost 36p per minute ...
Factories are no longer allowed to pollute the air with black smoke.不再允许工厂的黑烟污染空气了.These gases pollute the atmosphere of towns and cities.这些气体污染了城镇的空气。Mining would pollute the lake and denude the forest.采矿会污染湖水，毁掉森林。Bicy...