The surprise petrified her an instant : she uttered an inarticulate vocalization , and stood nailed .
這個意外的事使她愣了一下:她發(fā)出一聲不清晰的叫聲,便站在那里不動了。
Giraffes communicate with one another through posturing , movement , the way they carry their tails , retreat and sometimes vocalization , which can include moos , bellows and whistles .