You can listen to BBC or VOA news if you want to improve your listening.
如果你想提高听力,你可以听英国广播电台或美国之音的新闻节目。
It seems that man was making a real effort to understand the seasons 20,000 years earlier than has been supposed.
看来人类早就致力于探索四季变迁了,比人们想像的要早20,000年。