How to say "陆军那些飞行员口风很严" (lù jūn nà xiē fēi xíng yuán kǒu fēng hěn yán) in Chinese dialogue

jūnxiēfēixíngyuánkǒufēnghěnyán
Idioms & Colloquial Expressions
Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0114:11
gào
men
xiē
shì
qíng
ma
LINE 0214:13
PLAYING SCENE
jūn
xiē
fēi
xíng
yuán
kǒu
fēng
hěn
yán
LINE 0314:15
shén
me
tīng
dào
Show Information
Source MediaTV Series
Season & EpisodeS1 E34
Timestamp14:13
TMDB ID309609