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。