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- The groom, being the first messenger whom Durward had despatched from Schonwaldt, was now introduced with his letters. 这时，达威特从索恩瓦尔德最先派回来送信的那个马夫拿着信走了进来。
- Hcrmone , n nutransmitt cell factors,growth factor from the extraceliular are called the first messenger cAMP, cGMP, W3,DAG,Cain cytoplasm are called the second messengers. 胞外第一信使（包括激素、神经递质、细胞因子、生长因子等）与其特异受体结合后，被激活的受体通过刺激特定的效应酶或离子通道，而在胞浆内产生第二信使（包括cAMP，cGMP；IP_3，DAG；Ca~(2+)等）；
- Leaving her first job was a watershed in her life. 辞去她的第一份工作是她生活中的一个转折点。
- Cook the meat quickly at first to seal in the juices. 一开始要大火烧肉，以便保存肉汁。
- In the word "mother" the stress is on the first syllable. 在"mother"这一字里，重音在第一个音节上。,在＂mother＂这一字里，重音在第一个音节上。
- His illness was more serious than the doctor first thought. 他的病较医生原来以为的更严重。
- Passengers with cars must embark first. 带汽车的乘客必须先上船。
- Bob teed off on the new pitcher's first delivery. 鲍勃猛击那新投手所投的第一个球。
- Alarmed at the first sound, we hit the dirt. 第一声警报一响我们就迅速卧倒。
- She struck up the first carol on the grand piano. 她在那架大钢琴上演奏起第一支颂歌。
- He picked a winning number on the first draw. 他第一次便抽到一个中奖号码。
- Slop out the waste basins first when you get up. 起床的第一件事是把例盆倒了。
- The runner was retired put out at first base. 跑垒者于第一垒上被刺杀出局。
- They drew lots for the right to go first. 他们抓阄儿决定谁先走。
- Our reporter was the first person on the scene. 我们的记者是最先到达出事地点的。
- We got knocked out of the Cup in the first round. 我们在锦标赛的第一轮比赛中就被淘汰了。
- He overlooked a spelling error on the first page. 他没有看出第一页中有个拼写错误。
- A slow theme introduces the first movement. 第一乐章以缓慢的主旋律开始。
- They set sail with the first fair wind. 他们一有顺风就扬帆起航。
- I fell in love with her at first sight. 我第一眼见到她就爱上了她。
