口笛 meaning in Chinese

call (or pipe)
whistle

In the meadows in the meadows , he heard with a whistle and string music , drowned from time to time in a roar of voices . the officers spirits , too , rose at these sounds , but at the same time he was in terror lest he should be held responsible for having so long delayed giving the important message intrusted to him
口笛声和托尔班琴琴声伴着舞曲，时而被喊叫声淹没，那个军官听到这些声音，心中也很高兴，但是同时他又有点害怕，惟恐这么久没有把交付给他的重要的命令送到，因此而获罪。