21.   His lips quivered.

22.   His lips quivered as if he were talking to himself.

23.   His lower lip quivered involuntarily.

n. + quiver >>共 51
lip 23.23%
voice 15.15%
body 7.07%
market 3.03%
chin 2.02%
finger 2.02%
feather 2.02%
mouth 2.02%
child 1.01%
chime 1.01%
lip + v. >>共 137
be 19.86%
tremble 5.64%
quiver 5.19%
move 4.74%
part 3.39%
curl 2.93%
curve 2.26%
meet 2.26%
twist 1.81%
touch 1.58%
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