21.   Record breaking heat persisted in the Northeast on Thursday as spring snowstorms pounded portions of the Rocky Mountains.

n. + persist >>共 673
problem 6.38%
weather 4.15%
condition 2.93%
violence 2.89%
rumor 2.52%
cloud 2.36%
question 2.28%
pain 1.95%
tension 1.75%
symptom 1.46%
heat 0.85%
heat + v. >>共 313
be 28.63%
make 3.47%
cause 2.78%
come 2.08%
continue 1.60%
rise 1.46%
persist 1.46%
kill 1.46%
take 1.39%
melt 1.25%
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