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- In the normal rats on gestational days 15, URS fuses with cloacal membrane, and on gestational days 16 anal membrane ruptures and rectum communicate with the anus. 鼠胚胎 15d时尿直肠隔与泄殖腔膜融合。 胚胎 16d肛膜完全破裂 ,直肠与外界相通。
- The meat marinated in the brine for two days. 这块肉在盐水里泡了两天。
- It was in the days when motorcars were rare. 那是在汽车还罕见的时代。
- Goods of high quality are few and far between these days. 质地精美上乘的物品现在不多见。
- I shudder to recall those days of humiliation. 想起那些屈辱的日子，真是不寒而栗。
- His talk was evocative of the bygone days. 他的谈话令人回忆起往昔的时日。
- He was born in the palmy days of peace. 他出生于和平的兴盛时期。
- He often dreams about his days in the countryside. 他常梦见在乡下的那些日子。
- My grandpa died of hunger in the old days. 我爷爷在旧社会死于饥饿。
- My mind traveled over the happy days of my boyhood. 我脑海里时时浮现出少年时代那些快乐的事。
- Our firm is stacking up pretty well these days. 我们公司目前情况相当不错。
- He often cut recitation during his college days. 他上大学时经常无故旷课，逃避背诵练习。
- I work both on sunny days and on rainy ones. 我风雨无阻地工作。
- Gestation extends from fertilization to birth. 妊娠期系指从配种到分娩之间的时间。
- The smouldering wreck fumed for days. 燃烧的残骸冒了好几天的烟。
- This film was two years in gestation. 这部 电影酝酿了两年。
- These cruise ships can turn round in two days. 这些游船可用两天的时间装卸完毕。
- A top hat is a rare sight these days. 高顶大礼帽现在已不多见。
- He and his wife seem to be on the outs these days. 他和他的妻子最近似乎感情很不好。
- He is on night duty three days a week. 他一个星期要上三天夜班。
