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。

　　The children are at different stages of development.

　　這些孩子處于不同的成長階段。

　　It's only human to want the best for your children.

　　為自己的孩子謀求最好的條件是人之常情。