a stroke of luck (ā sī tè ān dé tǎi ěr dé ào fū)

Idiom Luck

含义

something good that happens by chance

偶然发生的好运 (ǒu rán fā shēng de hǎo yùn)

例句

"It was a stroke of luck that I found my lost wallet."

"我找到丢失的钱包真是一场幸运。" (Wǒ zhǎo dào diū shī de qián bāo zhēn shì **yī chǎng xìng yùn**.)