胚囊,普通具有8个遗传上相同的单倍体核.Embryo has most commonly eitht genetically identical haploid nuclei.植入之后不久,胚囊的壁, 即滋养细胞含有两层细胞.Shortly after implantation the blastocyst wall, the trophoblast, consists of two layers of cells.存在于胚囊和胎座中的...
Many hoped he would renew the country's atrophied political system.很多人都期望他能使该国萎靡的政治体系振作起来。Scott's muscle atrophied, his leg became stunted, and he was left lame.斯科特的肌肉萎缩，一条腿发育不完全，成了个瘸子。Patients exercised their ...
Method: 40 curved mesial - buccal canals in mandibular molars were selected and divided into two groups randomly.方法: 选取40个下颌磨牙近中颊侧弯曲根管,随机分为两组,每组20个根管.Methods Cap splints wereto the occlusional and were used to fix the ma...