The Guardian:

China reported nearly 3,400 daily Covid-19 cases on Sunday, double the previous day, forcing lockdowns on virus hotspots as the country contends with its gravest outbreak in two years.

China has maintained a strict zero-Covid policy enforced by swift lockdowns, travel restrictions and mass testing when clusters have emerged.

But the latest flare-up, driven by the highly transmissible Omicron variant and a spike in asymptomatic cases, is challenging that approach.

生词短语：

flare up

突然燃烧

flares

喇叭裤

transmissible

可传染的

asymptomatic

无症状的

asymmetric

不对称的

asynchronous

不同步的