01:30Can you see the grey box? Sensory adaptation explained by Kit Yates #sciencedemo #optical #sensory
The Royal Institution
Ahead of the UK general election, the issue of security is high on the political agenda. Security is the protection of people or places from danger or attack. But how do we pronounce the word security? Watch the video and find out. There's more on our website: http://www.bbc.co.uk/learningenglish/english/course/english-you-need/unit-18/session-3 Do you want to learn how to speak English? Then join us here on YouTube for great grammar, drama, news, study, pronunciation, vocabulary, music, interviews and celebrity videos. Every day we have a new video to help you with English. We also produce regular 'extra' videos across the week so come back every day to see what's new. We like receiving and reading your comments - please use English when you comment. For more videos and content that will help you learn English, visit our website: http://www.bbclearningenglish.com
Published 2017-06-07 · Watch on YouTube ↗
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