The first blow is half the battle.

良好的开端，就是成功了一半。 。

youdao

The first blow makes the anger, but the second makes the fray.

第一拳引起愤怒，第二拳招致争吵。

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Hawking says the first blow to Newton's belief that the universe could not have arisen from chaos was the observation in 1992 of a planet orbiting a star other than our Sun.

霍金说，对于牛顿的宇宙不可能从混沌中诞生这一理念的第一次打击是在1992年，当时观测到了一颗行星在绕着一颗并非我们的太阳的恒星运行。

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The first blow landed on the evening of February 8, when R&B star Rihanna cancelled her performance at the Grammy Awards ceremony.

VOA: standard.2009.12.25

He doesn't at first hear the horn fail to blow, and then later, when a truck pulls up behind him, he fails to hear a horn that does blow: He was looking at the sign, and he didn't hear the horn.

在一开始,是他没有注意到这点，到后来卡车停在身后时，他连响的喇叭都听不到了：,“他看着那个标牌，以至于没听到喇叭声。

耶鲁公开课 - 1945年后的美国小说课程节选

And, if so, was the blackout but the first blow in a lethal one-two punch?

CENTERFORSECURITYPOLICY: The Next Blackout

Scotland struck the first blow in the 16th minute after Contepomi dragged his first penalty attempt wide.

CNN: Argentina clinch final semi place

The Chicago Blitz struck the first blow, signing a highly coveted Ohio State running back named Tim Spencer.

WSJ: Remembering the Late, Great USFL