Suddenly Heidi, hearing a shrill whistle, rushed outside, as Peter and all his goats came racing down.
突然，海蒂听到一声尖利的口哨，她冲了出去，彼得和他所有的山羊都跑了下来。
The grandfather stood under the door, watching her, when suddenly a shrill whistle was heard.
爷爷站在门下看着她，突然传来一阵尖锐的口哨声。
For us, the slothful spell was broken on our second afternoon by a shrill whistle.
对我们来说，懒散的日子在第二天下午被一阵尖利的口哨声打断了。
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