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Who decides how long a second is? - John Kitching

1,642,629 views

TED-Ed

Video Language:

  • English

Caption Language:

  • {{captionLanguage | language_name}} ({{captionLanguage}})

Accent:

  • English (US)

Speech Time:

91%
  • 5:18 / 5:46

Speech Rate:

  • 130 wpm - Conversational

Category:

  • Education

Tags :

Intro:

Video Vocabulary

revolution

/ˌrevəˈlo͞oSH(ə)n/

noun

When a group overthrows an existing government.

divided

/diˈvīdəd/

adjective verb

split into parts. To split numbers by another number, e.g. 6 / 2 = 3.

required

/rəˈkwī(ə)rd/

adjective verb

officially compulsory, or otherwise considered essential. To need something, to make it necessary.

sufficient

/səˈfiSHənt/

adjective

enough.

alongside

/əˌlôNGˈsīd/

preposition

Side by side with something.

precise

/prəˈsīs/

adjective

marked by exactness and accuracy of expression or detail.

through

/THro͞o/

adjective adverb preposition

From one end or side of something to the other. expressing movement into one side and out of other side of opening etc.. moving in one side and out of other side of.

pastoral

/ˈpastərəl/

adjective noun

Of the duty of care that a teacher, priest has. work of literature portraying country life.

defined

/dəˈfīnd/

adjective verb

having definite outline or specification. To explain the meaning of words.

ancient

/ˈān(t)SHənt/

adjective noun

of very distant past. old man.

obvious

/ˈäbvēəs/

adjective

Easily understood and clear; plain to see.

society

/səˈsīədē/

noun

A group who meet to share values or interests.

measured

/ˈmeZHərd/

adjective verb

having slow, regular rhythm. To calculate size, weight or temperature of.

numerous

/ˈn(y)o͞om(ə)rəs/

adjective

great in number.

calendar

/ˈkaləndər/

noun verb

document. record.

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