Ferguson may well have had it in mind to engineer a transition, but Ben Foster was undone when he had to justify his sound reputation by standing between the posts for United week after week.
弗格森也许已经想好了过渡方案，但福斯特仍周复一周地站在曼联的大门前，为自己的声誉而正名。
2
Because of the particularity of acoustic area transition and mixed sound, the problem of tenor is always difficult to solve.
因声区转换及混声的特殊性，男声的高音演唱问题一直是比较难解决的。
3
Now most sound absorption layers are impedance transition constructs, which have been used widely, but their thickness is limit and cannot meet the need of absorbing sound at low frequency.