标题: 求助。 [打印本页] 作者: vcsanity 时间: 2010-9-16 13:34 标题: 求助。 Unlike a hurricane, which can be observed from within, a tordado is so small that such a study has not been practical.
B) that studying it that way has not been impractical C) for such studies as this to have been impractical D) as to not make such a study practical. E) as to be impractical of study