Yabla video uses of 闰月

平均 píngjūn
十九 shíjiǔ
nián
yǒu
闰月 rùnyuè
On average, there are seven leap months in nineteen years.
所以 suǒyǐ
sān
nián
就要 jiùyào
安插 ānchā
闰月 rùnyuè
So, every three years, there is an extra leap month.
zài
guò
liǎng
nián
yòu
安插 ānchā
闰月 rùnyuè
After another two years, there's another leap month.