束的中心有一个管状的髓部，其中有类球形的髓细胞统松排列，常有气隙存在。
A cylindrical medulla is present in the centre of each bundle and packed loosely with roundish medulla cells.
束衣制造者建议每个早晨都收紧女孩束衣的系带，如果在黄昏时分晚餐之前带子变得足够松就再紧一次。
Staymakers advised tightening a girl's LACES every morning and, if possible to get enough slack, in the late afternoon before dinner.
得到了在不同情况下出现的光子反聚束、光场的亚泊松行为以及光场的挤压性质。
We obtain antibunching of photons. the sub-poissonian behaviour of optical fields and their squeezing properties in different cases.
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