短语词组短语Gravid mouse 妊娠母鼠gravid trophocyte 妊娠滋养细胞gravid segment 孕节gravid rate 妊娠率gravid horn 孕角gravid prawn 怀卵亲虾gravid mice 妊娠母鼠gravid proglottld 孕节gravid proglottid 妊娠节片;孕节 返回 gravid