在中国，各种规模的蚯蚓反应器已经研制成功并投入了一定的实际应用，但在蚯蚓产物质量控制方面以及家庭普及方面还处在起步阶段。
In China, earthworm bioreactors of different scale already succeeded in developing, but it is still in the starting stage in production quality controlling and the using of bioreactor.
家庭户规模缩小，主要是人口控制所产生的积极效果。
The smaller family size is mainly due to the positive results of population control.
家长们说他们控制家庭规模的主要原因是经济上的困难。
Parents state financial difficulties as the main reason for 31 restricting family size.
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