動(dòng)詞 pitch in:

1. eat heartily
   同義詞：dig in

1. After the christmas dinner, we all pitch in to clean up the house.
   耶誕晚餐後，我們?nèi)紕?dòng)手幫助清理房子。
2. An electromagnetic wave of audio frequency produced by atmospheric disturbances such as lightning, having a characteristically decreasing frequency responsible for a whistling sound of descending pitch in detection equipment.
   嘯聲干擾一種由于諸如閃電等大氣干擾而產(chǎn)生的音頻電磁波，具有典型的逐漸減弱頻率的特征，該頻減引起了檢波設(shè)備中調(diào)逐漸下降的嘯聲
3. The fans rushed onto the pitch in an excited mob.
   球迷群情激昂，一窩蜂涌進(jìn)球場。