Today's Sentence
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In birds, and in humans, the lower respiratory system is shaped sort of like an upside-down slingshot.
Original Video：
Why parrots can talk like humans
Key Vocabulary
1. respiratory
respiratory
[rɪˋspaɪrə͵torɪ] (adj.)
2. slingshot
slingshot
[ˋslɪŋ͵ʃɑt] (n.)
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