Faculty shall allow parents to observe classes without an advanced notice.

在不影响教学秩序情况下， 教师应欢迎家长来听课。

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Israel was expected to get some advanced notice of the start of the American military operation.

CNN: As war begins, no change in Israel's alert status

Further, 12 days advanced notice was required by the government of Yemen for these brief fuel stops.

CENTERFORSECURITYPOLICY: Navigating new naval threats

To give them proper credit, the FDA has helped to avert some drug shortages in 2010 and 2011, when advanced notice was provided.

FORBES: Drug Shortages Compromise Emergency Medical Care