The questionnaire was designed through literatures reading, experts assessing and pre-investigation.
调查表的设计经过文献查阅、专家讨论、预调查等过程。
2
It is shown that these laws are available and convenient for the active flow control on the THUNDER smart wing and provide the pre-investigation of the active control system design.
设计计算结果表明，该方法简便、有效，是一种适合智能机翼翼面流场主动控制的开环控制律。
3
That search, he says, provides as much information as he used to gather during a 12-month investigation in pre-Web days.