now or never
now
ˈnaʊ
naw
or
ɔ:
aw
ne
nɛ
ne
ver
və
vē

英語での「now or never」の定義と意味

now or never
01

used to suggest that right now is the only time a person has a chance for taking an opportunity or else they lose it forever 

now or never definition and meaning
慣用句
例
If you want to apply for the grant, it's now or never. 
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