試驗應用雞公雛, 檢測了人工合成青蒿素對雞盲腸球蟲病的預防效果.Using younger cocks, the preventive result of artificial synthesize arteannuin to Chicken Caecum Coccidiosis was examined.目的了解張家口地區兔球蟲種類及感染情況.Objective To get message of the coccidian infe...
用水泥砌牢石頭.Stones are bedded in cement.她用水泥抹墻，并趁它還沒干時粘上貝殼。She rendered the walls in cement and, while it was still wet, applied the shells.這個磚房的前面用水泥抹的.The front of the brick house was faced with cement....