It is necessary (for me) to understand and support abused children.
It is imperative that we (I?) understand and support children who have been abused.
「虐待された子への理解と支援が必要だ」= It is necessary (for me) to understand and support abused children. / It is imperative that we (I?) understand and support children who have been abused.
個人的な話であれば「for me」や「I」を使う必要があります。一般的に話しているなら、「for me」を使う必要がありません。
ボキャブラリー
necessary = 必要
understand = 理解する
support = 支援する
abused children/children who have been abused = 虐待された子
I think our society needs to offer much more support and understanding for children who have been neglected or abused.
この場合、次のような言い方ができますよ。
ーI think our society needs to offer much more support and understanding for children who have been neglected or abused.
「社会は、育児放棄や虐待されている子供たちにより多くの支援と理解を差し出す必要があると思う」
children who have been neglected or abused で「育児放棄や虐待されている子供たち」
ご参考まで!