表2() 当时，该逼近实现需要19个子区间的翻译：Table 2 (a) at that time, the approach requires 19 subinterval 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Table 2 () at that time, the approach required to achieve sub-interval 19

Table 2 (a) at that time, the approach requires 19 subinterval

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Table 2 () where and when they need to be achieved, the approaching 19 1.78interval

Table 2 (a) at that time, the approach requires 19 subinterval