在这风云变色的几年间, 北京陷落了.As the difficult years passed , Peking fell.分别探讨了接插件镀金和镀银层变色的原因.The causes of tarnishing gold and silver - plated connectors were studied respectively.我养了一只四脚蛇, 变色的时候很有趣.I am raising a lizard, it is int...
限制饮食和放松身心是保持健康的两个要诀。Diet and relaxation are two important keys to good health.住房条件差、家庭压力大会影响身心两方面的健康。Poor housing and family stress can affect both physical and mental health.长途飞行后，你可能会感到身心疲惫。You may be physically and me...