How to say "出军必经一条天堑" (chū jūn bì jīng yī tiáo tiān qiàn) in Chinese dialogue

chūjūnjīngtiáotiānqiàn

our army must pass a gorge.

Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0139:30
àn
de
huà

According to your plan,

LINE 0239:31
PLAYING SCENE
chū
jūn
jīng
tiáo
tiān
qiàn

our army must pass a gorge.

LINE 0339:33
shǒu
nán
gōng

It's easy to defend but hard to launch attacks.

Show Information
Source MediaTV Series
Season & EpisodeS2 E21
Timestamp39:31
TMDB ID124595