采用不同附着基，进行泥蚶人工育苗中立体平面附着与池底平面附着的对比试验。
A contrastive experiment was made on spat fall of Anadara granosa with the solid plane and the pond-bottom plane as substrate in the artificial seed-rearing.
关于中立区和侵犯中立区，中立区指的是球的前后竖直平面。
The Neutral Zone is the space between the forward and backward points of the ball (planes).
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