Pronunciation Challenge How Classrooms Slow Your Brain Down

Host : Annie Huang
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Have you guys have experiences that you feel sleepy when in a classroom or an office?

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Today's Sentence

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The longer we stay in an unventilated space, especially with multiple people, the higher the concentration of carbon dioxide in the atmosphere.
Original Video： How Classrooms Slow Your Brain Down

Key Vocabulary

1. unventilated

unventilated

[ʌnˋvɛntə͵letɪd] (adj.)

ventilate

[͵vɛnt!ˋet] (v.)

vent

[vɛnt] (n.)

2. concentration

concentration

[͵kɑnsɛnˋtreʃən] (n.)

3. atmosphere

atmosphere

[ˋætməs͵fɪr] (n.)

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