英语语法分析

PGC from genital ridge and mesenterium of human embryo was incubated on fibroblast feeder layers for subculture.

从人胚胎生殖嵴、肠系膜中消化分离的原始生殖细胞，将其接种在人子宫内膜成纤维细胞饲养层上传代培养。

Therefore, (1) the specimen was drew from the lymphoid knot in mesenterium.

因此，我们在建库时注意到（1）标本取自肠系膜淋巴结。

Objective to investigate the feasibility of dealing with the mesenterium of appendix without using titanium nip in laparoscopic appendectomy (la).

目的探讨腹腔镜下阑尾切除术(la)阑尾系膜免钛夹处理的可行性。