need to do 需要 inform sb.of sth 通知某人某事 in advance 提前
根据你的问题需要主语从句
what needs to be informed of in advance is .....
需要事先通知的是
Need to be notified in advance is
需要事先通知的是
Need to be notified in advance is
what need us to inform first is
Prior notice is required.
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