1. the practicability of flying
   飞行的可行性
2. OBJECTIVE To study the practicability of sulfacetamide sodium eye drops and ofloxacin eye drops without preservatives.
   目的:探讨无防腐剂的磺胺醋酰钠滴眼液和氧氟沙星滴眼液的可行性。
3. Technicality reliability and practicability for the newly-reformed LSY conveyor have been highly improved.The specification and model of the products have been seriated.
   新改良的LSY型系列产品的技术性，可靠性和实用性都有突破性的提高，产品的规格，型号己系列化。
4. As a kind of practical artistic form combining with technologies and arts,the shoes contain two lays:one is their corporality and practicability;
   鞋靴作为一种技术性与艺术性结合较为紧密的实用艺术形式,它包含两个层面:其一是它们的物质性和实用性;

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