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- A sea bird (Alca torda) of the northern Atlantic, having black-and-white plumage and a white-ringed, flattened bill. 刀嘴海雀：大西洋北部的一种海鸟，（刀嘴海雀）羽毛黑白兼杂，喙扁平且有白圈
- Meanwhile, in Latin America, one will say goodbye to the Free Trade Area of the Americas (FTAA, or in Spanish ALCA). 与此同时，在拉丁美洲，人们将会对美洲自由贸易区（FTAA，在西班牙语里是ALCA）说声拜拜。
- AL＝sodium alginate; CA＝carrageenan; ALCA＝sodium alginate plus carrageenan; CONT＝control. The number followed indicated the targeted fat content of raw sausage. 海藻酸钠；CA＝鹿角菜胶；ALCA＝海藻酸钠加鹿角菜胶；CONT＝控制组。数字表示生鲜香肠之目标脂肪含量。
- According the results of domestic and foreign research, this article attempted to construct the framework of agricultural life cycle assessment(ALCA) in China. 根据国内外研究成果，尝试建立农业生命周期评价框架。
- NASA and the Associated Landscape Contractors of America (ALCA) have announced the findings of a 2?year study that suggest the common indoor plant may provide a natural way of helping combat "Sick Building Syndrome. 美国国家航空航天局和美国园林产业联合会发布了他们研究两年后的发现：普通室内植物可能提供一种帮助防治“大楼综合症”的自然方式。
- ALCA (American Leather Chemists' Association) 美国皮革化学家协会
- 1. A sea bird (Alca torda) of the northern Atlantic, having black-and-white plumage and a white-ringed, flattened bill. 刀嘴海雀：大西洋北部的一种海鸟，（刀嘴海雀）羽毛黑白兼杂，喙扁平且有白圈
- alcloxa 铝克洛沙
- alca (=alcloxa) 尿囊素氯羟铝,(=anomalous left coronary artery) 异常左冠状动脉
- Alcaíno 阿尔凯诺
- Alcañas 阿尔卡尼亚斯
- Alcañiz 阿尔卡尼斯
- Alcaçarenho 阿尔卡萨雷尼奥
