我们选取了烂鳍病、白便病和腹水病这三种在2002 ~ 2003年最为常见的养殖大菱鲆细菌性疾病进行病原学的研究。
Fin rot, white feces and ascites syndromes were the common diseases in the years from 2002 to 2003, thus the aetiological study for these bacterial diseases had been emphasized.
他犯了第二次错误：白先生单独去公园，他便不待下去。
He had committed a second, by not remaining at the Luxembourg when M. Leblanc came thither alone.
马白夫公公走进屋子，拿起帽子，机械地要找一本书夹在胳膊下面，找不到，便说道：“啊！对！”
Father Mabeuf went to his room, took his hat, mechanically sought for a book to place under his arm, found none, said: "Ah! Truly!" and went off with a bewildered air.
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