Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

“春联”或“对联”对立在中国是一种特殊的文学形式。春联是由贴在门口两侧两组对仗的句子组成，在门上面的横批通常是一个吉祥的短语。不论是大富大贵还是贫困潦倒，学富五车还是乡野村夫，每家每户都要在新年时门前贴春联，以寄托对新年的美好祝愿。

Celebrate Australia Day with the Australian community across the GBA on Sunday, January 26! Enjoy delicious food, drinks, ...

镉对心脏和其他很多器官都有毒性，根据美国食品药物监督管理局的规定，人体接触镉的阈值很低（每天每公斤或每2.2磅体重0.21-0.36微克）。摄入可能引起胃部不适、恶心和呕吐。