By Levels

Library

EXP: 08888
HITS: {{lyricTraining.hits}}888
STREAKS: {{lyricTraining.streaks}}888
TIME: {{lyricTraining.timeout / 1000}}88
{{word.word}}

{{cue.translated_text}}

{{lyricTraining.hint}}

x{{playblackSpeed.toFixed(2)}}

Loading ..

Not Found

{{annotation.word}} ({{annotation.pos_simplify}})

/{{annotation.phonetic}}/

{{annotation.translation}}

{{annotation.name}}

{{annotation.sub_type}}

{{annotation.definition}}
Back

Games & Quizzes

Training Mode - Typing
Fill the gaps to the Lyric - Best method
Training Mode - Picking
Pick the correct word to fill in the gap
{{game.name}}
{{game.description}} Requires {{game.required_annotions}} vocabulary annotations

Congratulations! You gained {{totalPoint}} XP

You may need to watch a part of the video to unlock quizzes

Don't forget to Sign In to save your points

Repeat Skip ({{game.question_index}}/{{game.questions.length}})
{{part}}
Repeat Skip ({{game.question_index + 1}}/{{game.questions.length}})
{{choice.text}}
{{choice.text}}

Make correct pairs from two columns

{{lyricTraining.finished && lyricTraining.timed_out ? 'Timed Out' : 'Challenge Accomplished'}}

PERFECT HITS {{lyricTraining.stats.PERFECT_HITS}} +{{lyricTraining.stats.PERFECT_HITS * 20}}
HITS {{lyricTraining.stats.HITS}} +{{lyricTraining.stats.HITS * 10}}
LONGEST STREAK {{lyricTraining.stats.LONGEST_STREAKS}} +{{lyricTraining.stats.LONGEST_STREAKS * 10}}
REMAINING TIME {{lyricTraining.timeout / 1000}}s +{{lyricTraining.timeout / 1000}}
TOTAL +{{lyricTraining.exp}}
{{word.word}} - {{dictionary.definition[0].phonetic || ("/" + dictionary.phonetics +"/")}} - {{word.translation}}

We couldn't find definitions for the word you were looking for.
Or maybe the current language is not supported

{{simpleDefinition.pos}}

{{simpleDefinition.def}}

{{word.word}}

Sentences & parts of speech:

  • {{tag.normal}} {{tag.pos_name}}

  • {{c.startTime | duration}}


    {{c.translated_text}}

All {{pos.pos_simplify}}
{{a.word || a.name}}
/{{a.phonetic}}/
{{a.type || a.sub_type}}
{{a.translation}} 		{{a.definition}}

Directional derivative, formal definition

188,790 views

Khan Academy

Video Language:

  • English

Caption Language:

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

Accent:

  • English (US)

Speech Time:

96%
  • 6:24 / 6:38

Speech Rate:

  • 195 wpm - Fast

Category:

  • Education

Tags :

Intro:

Video Vocabulary

through

/THro͞o/

adjective adverb preposition

continuing or valid to final destination. expressing movement into one side and out of other side of opening etc.. By a particular way or process; by the use of.

written

/rīt/

adjective other verb

Expressed using writing. To invent or create a computer program. To create a song or piece of music.

negative

/ˈneɡədiv/

adjective exclamation noun verb

characterized by absence of distinguishing features. no. Image on camera film used to make a photo. refuse to accept.

slightly

/ˈslītlē/

adverb

to small degree.

diagram

/ˈdīəˌɡram/

noun verb

simplified drawing. To show or explain something by drawing a picture.

quickly

/ˈkwiklē/

adverb

Without taking a lot of time; fast.

another

/əˈnəT͟Hər/

adjective determiner pronoun

One more, but not this. used to refer to additional person or thing of same type as one. One more (thing).

derivative

/dəˈrivədiv/

adjective noun

Not from original ideas; from somewhere else. thing derived from another source.

imagine

/iˈmajən/

verb

form mental image of.

partial

/ˈpärSHəl/

adjective noun

Giving better treatment to one person than another. overtone or harmonic.

influence

/ˈinflo͝oəns/

noun verb

The power to affect what happens, to persuade etc.. have influence on.

function

/ˈfəNG(k)SH(ə)n/

noun verb

Social event, or party such as a wedding. To serve a certain purpose or role.

nudging

/nəj/

verb

prod gently with one's elbow.

drawing

/ˈdroiNG/

noun other verb

picture or diagram made with pencil, pen. To get closer to or approach something or someone. To get closer to or approach something or someone.

mapping

/ˈmapiNG/

noun verb

operation that associates each element of given set domain with one. To draw a diagram to show the geography of an area.

Q
W
E
R
T
Y
U
I
O
P
A
S
D
F
G
H
J
K
L
Z
X
C
V
B
N
M