当井架工在二层台工作时，司钻和井架工一定要能时刻保持联系。
The Driller and the Derrickman must be able to communicate at all times when the Derrickman is working on the derrick board.
例如，若某台多层交换机支持ip协议，ipx包则只能在第二层上交换，不能在第三层上规定路由。
For example, if a multilayer switch supports IP, then IPX packets can only be switched at layer 2 not routed at layer 3.
从此观点出发，导出以二层电性剖面为特征的台站正常地电阻率相对似年变化幅度公式。
From this model section, a formula is obtained for calculating the amplitude of relative apparent annual variation of resistivity at a station characterized by two resistivity layers.
一层为洗浴及桑拿设施和厨房、商店与出发台等配套设施；二层为咖啡厅及开敞餐厅与会议室等。
The club is a two-story horizontally developed construction with its first floor equipped with spa, kitchen, stores and Caddy master while the second floor cafe, restaurant and meeting room.
另一边墙横着一个破旧的二层木架子，一台旧式14寸彩电放在上面，第二层放着一个生锈的小电饭煲和两个饼干罐，这些就是我所看到的。
To the other side of the wall there was a two-layered wooden shelf, with an old television set above and a rusted rice-cooker and two biscuit tins at the bottom.
另一边墙横着一个破旧的二层木架子，一台旧式14寸彩电放在上面，第二层放着一个生锈的小电饭煲和两个饼干罐，这些就是我所看到的。
To the other side of the wall there was a two-layered wooden shelf, with an old television set above and a rusted rice-cooker and two biscuit tins at the bottom.
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