id	keyword
eltls-56780	english
eltls-56780	chinese
eltls-56780	textbooks
eltls-56780	english textbooks
eltls-56780	character
eltls-56780	language
eltls-56780	pronunciation
eltls-56780	notation
eltls-56780	shanghai
eltls-56780	vocabulary
eltls-56780	dialect
eltls-56780	china
eltls-56780	conversation
eltls-56780	words
eltls-56780	teaching
eltls-56780	company
eltls-56780	foreign
eltls-56780	learning
eltls-56780	english language
eltls-56780	cantonese
eltls-56780	ying
eltls-56780	phrases