该技术的缺点是网络带宽使用效率低、速度慢。
Disadvantages of this technique include an inefficient use of network bandwidth and slow speed.
在立井冻结砾石层段施工中，人工风镐掘进劳动强度高、速度慢、效率低。
Excavation in frozen gravel with air picks has the shortage of high labor intensity, low speed, and low efficiency.
比照传统遗传算法与生物界进化过程，分析了引起传统遗传算法收敛速度慢和寻优效率低的两个原因。
By contrasting the traditional genetic algorithms (TGA) with the biologic evolution, two kinds of reasons that the convergence speed and searching efficiency in TGA are both lower are concluded.
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