单词：germinal center
germinal center的用法和样例：
例句
- There are many small lymphocytes underneath the epithelia, without formation of germinal centers.上皮下有很多小淋巴细胞，未见生发中心形成。
- Beneath the capsule is the paracortical zone with lymphoid follicles having a pale germinal center in which the immune responses are often generated.被膜下方是有淋巴滤泡的副皮质区，淋巴滤泡有一苍白色的生发中心。
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