前言：目的正确选用空气消毒洁净器。
Purpose: For the right choose and use the air disinfect-purifying machine in ICU.
研究锤头的材质对其耐磨性的影响作用，对保证正确选用材质有重要的意义。
Thus it is significant to study the influence of head materials on abradability.
选用正确的短语完成句子。
最后，根据你的情况，选用正确的清洗化合物。
Finally, use the right kind of purging compound for your situation.
正确的选用可确保系统高效运作。
Correct exertion, guarantee system high-efficient operation.
正确的选用可确保系统高效运作。
Correct exertion, guarantee system high-efficient operation.
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