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- Bitches have their first estrus (also know as season or heat) after six months of age, although it can occur as late as 18 months to two years of age. 一些在母犬六个月龄后就会有第一次发情，有些则会迟至18个月甚至两岁。
- 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。
- The library boasts first edition of Shakespeare. 这个图书馆以藏有初版的莎士比亚集而自豪。
