“口型” 英語怎麽說？

[詞典]

the

shape

of

a

mouth

when

a

person

is

speaking

or

pronouncing

a

certain

sound;

[例句]我用口型默示告別，然後匆匆跟在媽媽身後走了進去。

i

mouthed

a

goodbye

and

hurried

in

behind

momma