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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

Being split in two or more pieces. To split numbers by another number, e.g. 6 / 2 = 3.

required

/rəˈkwī(ə)rd/

adjective verb

officially compulsory, or otherwise considered essential. To demand that someone does something.

sufficient

/səˈfiSHənt/

adjective

Having or providing enough when needed.

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

continuing or valid to final destination. From the beginning of something until the end. Allowing you to pass between, or to.

pastoral

/ˈpastərəl/

adjective noun

(of land) used for grazing animals. 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 perceived or understood.

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

Existing in large numbers.

calendar

/ˈkaləndər/

noun verb

document. record.

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