鉛中毒(1)

科學(xué)60秒: “這是我的！”——小毛孩的怪想法

MINE! That word appears early in life. ___1___ do have an idea of ownership. They also have an idea of what can be owned, and what can’t. Children as young as three believe human-made obje

美元疲軟是為何？(1)

美元一直處于疲軟的狀態(tài)，原因何在？The dollar has been weakening against several major currencies. One euro is currently worth about one dollar forty cents. A British pound is worth over two dolla...

鉛中毒(2)

對于6歲以下的兒童，鉛中毒可能是致命的Experts say children and pregnant women should not be present during renovation work in housing that might have lead paint. Public health officials advise peo...