How to say "怎么就莫名其妙地自燃了呢" (zěn me jiù mò míng qí miào dì zì rán le ne) in Chinese dialogue

zěnmejiùmíngmiàoránlene

How could it spontaneously combust for no reason?

Idioms & Colloquial Expressions
Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0120:46
ān
quán
tiáo
dōu
hěn
wán
shàn

has thorough safety regulations.

LINE 0220:48
PLAYING SCENE
zěn
me
jiù
míng
miào
rán
le
ne

How could it spontaneously combust for no reason?

LINE 0320:51
ér
qiě
gāo
yíng
tiān
men
shì
dìng
hǎo
de

And Gao Ying and I had plans that day.

Show Information
Source MediaTV Series
Season & EpisodeS1 E1
Timestamp20:48
TMDB ID278868