目的：证明氧气雾化吸入器面罩吸氧的有效性，以便更好的向病人进行宣教，提高其利用效能。
Objective: to prove oxygen mask oxygen inhalation device effectiveness in order to better educate patients, and improve the effectiveness of its use.
最后，通过评估得出了国外几种典型的空战武器系统作战效能的优劣排序，验证了集对分析的可行性和有效性。
At last, we get compositor of operational efficiency of several foreign classic air-to-air weapon system by evaluation, and test the feasibility and validity of Set Pair Analysis.
青少年特发性脊柱侧弯支具治疗的效能存在争议，有效性仍未得到证实。
Background The efficacy of brace treatment for patients with adolescent idiopathic scoliosis remains controversial, and effectiveness remains unproven.
有效性教学必须通过效能型教师对课堂和学生的管理来实现。
The effective teaching must be realized through the efficient teacher's management to the classroom and the students.
防空通信系统是保障防空指挥和控制有效性的重要手段，其效能的好坏将直接影响到作战结果。
The air defense communication systems is a important means to guarantee the quality of the air defense command and control, its evaluation will affect the battle result directly.
目的：证明氧气雾化吸入器面罩吸氧的有效性，以便更好的向病人进行宣教，提高其利用效能。
This paper analyses the defects of bubble oxygen inhalators currently used, and investigates into their solutions for improvement.
目的：证明氧气雾化吸入器面罩吸氧的有效性，以便更好的向病人进行宣教，提高其利用效能。
This paper analyses the defects of bubble oxygen inhalators currently used, and investigates into their solutions for improvement.
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