Submitted by admin on Sat, 09/19/2015 - 00:52
definition:
of extreme importance; vital to the resolution of a crisis
sentence:
Trees play a crucial role supporting life across the globe, producing oxygen and absorbing climate change-causing carbon dioxide.
difficulty:
easy
toefl frequency:
3
toefl classification:
adverb:
crucially
adjective:
adverb sentence:
adjective sentence:
verb:
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noun:
noun sentence: