opens off短语¹³¹⁶²⁰⁺³ 例句 Final exit levels from stairs should be clearly marked as such, particularly where the exit opens off a stair that continues down or up beyond the level of the final exit. 楼梯的最终出口的标高应该依此清晰标出，尤其是在这个出口是从继续上下到最终出口以外标高的楼梯打开的场合。 www.1x1y.com.cn