The two groups of children have quite different characteristics.

　　這兩組兒童具有截然不同的特點。

　　Children usually transfer to secondary school at 11 or 12.

　　兒童通常在11或12歲時升讀中學。

　　It's a present for one of my children.

　　這是送給我的一個孩子的禮物。

　　Team sports help to develop a child's social skills.

　　集體體育運動有助于培養(yǎng)孩子的交際能力。

　　Certainly, the early years are crucial to a child's development.

　　毫無疑問，幼年對兒童的成長至關重要。

　　Positive and negative experiences form a child's character.

　　正反兩方面的經(jīng)歷都影響兒童性格的形成。