VOA常速英语:拜登和民主党高层举办白宫玫瑰园庆功会

1. The WHO has previously signed off on COVID-19 vaccines developed by Pfizer-BioNTech and AstraZeneca.

sign off on 认可，同意

Shareholders and regulators still have to sign off on that deal.

仍有待股权人和监督人同意签此合同。

2. The president: "Help is here," saying Americans will start seeing it this weekend in the form of $1,400 payments but even as he celebrated the president warned the devil is in the details.

the devil is in the details 细节决定成败

The devil is in the details and the death is at the speed.

细节决定成败，速度决定生死。

3. He'll hit the road next week to sell the plan's benefits in what's the White House is calling the "help is on the way tour."

hit the road 出发;动身

I was relieved to get back in the car and hit the road again.

回到车里重新上路后，我松了一口气。