下载一些鸟鸣的录音或买一些CD，这样你就可以知道你听到的是哪种鸟了，但是不要在野外放这些录音，因为这样会误导鸟儿或让它们感到迷惑。

Invest in downloadable bird songs or CDs so you can learn which birds you hear, but avoid playing those songs in the field when they might distract or confuse birds.

youdao

不需要望向窗外，你单单从不清脆的鸟鸣或车辆过往声音中就能知道下雪了。

Without looking out your window, you might know it snowed simply from noticing how bird calls or passing cars are slightly muffled.

youdao