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- Some women experience morning sickness during the first trimester of pregnancy. 有些妇女在怀孕的头三个月里,早上有恶心感。
- The first trimester of pregnancy. 妊娠的头三个月
- On the contrary NO donor may help to terminate of pregnancy in the first trimester. 反之，如使用NO供体则有助于终止妊娠。
- The researchers point out that the concentration of relaxin in the blood rises during the first trimester of pregnancy, when a woman's heart rate increase by about 40 per cent. 原译文为:研究人员指出，当一名妇女的心率加快约40%25时，妊娠的头三个月间血液中耻骨松弛激素浓度升高。
- 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。
- 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。
- 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。
- The first chapter delimits her area of research. 第一章阐明了她的研究领域。
- He's not in the first grade as a musician. 他不是第一流的音乐家。
- I didn't like the first part of the book. 我不喜欢这本书的第一部分。
- Don't buy the first car you see: shop around a bit. 买汽车时别见到一辆就买，多转几家挑一挑。
- It is the first time that I speak in public. 这是我第一次在公共场合发言。
- She did the first stage of the trip by train. 她行程的第一段是乘火车的。
- She ran herself out in the first few kilometers. 她才跑了几公里就没力气了。
