The two rightmost columns in table 1 represent two alternative index definitions, and the rows in the table show which of the predicates can (+) or cannot (-) be evaluated by either of the indexes.
表1最右侧的两列表示两个可选择的索引定义，表中各行展示了谓词可以(+)或不可以(-)由这两个索引进行计算。
The model is a basic two-by-two table, with strengthsand weaknesses laidout in the top two boxes and opportunities and threats in the bottom two.
此模型是由横竖各两格组成的，优点和缺点并列排在顶部两个模块中。 同时机会和威胁排在底部两个模块中。
The table with X, Y, Z axes to move, double squeegees with two directions printing, two directions put on the stencil and sure the circuit board can be printing by the through-hold.
台面设有X、Y、Z方向移动、双刮刀双向印刷、双向抬版、双向位移补偿，能确保线路转角夹缝无漏印、贯孔饱满等完美印刷效果。
The table with X, Y, Z axes to move, double squeegees with two directions printing, two directions put on the stencil and sure the circuit board can be printing by the through-hold.
台面设有X、Y、Z方向移动、双刮刀双向印刷、双向抬版、双向位移补偿，能确保线路转角夹缝无漏印、贯孔饱满等完美印刷效果。
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