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- Ragweed pollen, the allergenic one, reached its maximum in the atmosphere in August and showed a peak of diurnal periodicity at 7:00-9:00 am. 引起过敏的猪草属花粉，在八月达高峰，且日高峰出现于早晨七点至九点。
- Unlike most other bats, this species is diurnal. 这种蝙蝠与大多数蝙蝠不同，是在日间活动的。
- That period was a bright page in the history of Chinese literature. 那个时期是中国文学史上光辉的一页。
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- Childhood is a period of rapid growth. 幼年是生长迅速的时期。
- He consulted the chronicles of the period. 他参考了这一时期的编年史。
- He had to decide within a given period. 他得在一定时间内作出决定。
- She has a detailed knowledge of this period. 她对这段时期的情况了解地相当详细。
- In that period auto sales hit a14-year low. 这时期汽车销售量达到14年来最低水平。
- In this period, unemployment reaches record levels. 这段时间的失业人数又达到了创纪录水平。
- Which period of history are you studying? 你正在学哪一段历史？
- A diurnal animal hunts its food during daylight. 白天活动的动物在白昼时猎食。
- Can you tell me the time period when it was stolen? 能不能告诉我大概什么时候被偷的？
- In August the diurnal heat is oppressive. 八月里白天的暑热逼人。
- Chaucer wrote in the late mediaeval period. 乔叟写作的时代是中世纪末。
- She'll be away for an indefinite period. 她将离开一段时间，何时回来未定。
- This was the most difficult period of his life. 这是他一生中最艰难的时期。
- The meeting finally came to a period. 会议终于结束了。
- Rolled round in earth's diurnal course. 照着地球自转的轨道而滚动。
- A period signals the end of a sentence. 句号表示一个句子结束了。
