out of bounds   (TTS發音)

1. outside of the boundary lines in a game；not on or inside the playing field越軌；超出規定範圍

    He was out of bounds when he called his opponent names in the debate. 他犯規了，在辯論中謾罵了對方。

2. outside of the place where sb. may go禁止入內

    The teacher told the students that the new gymnasium being built on the school grounds was out of bounds. 老師告訴同學們正在興建中的體育館是禁止進去的。