本期内容：

The Australian city of Sydney has been hit by its heaviest rain in 30 years, bringing flooding and travel chaos and forcing thousands from their homes.
The state weather agency said 391.6mm of rain had fallen in the past four days, warning of potentially life-threatening flash floods.
Emergency services advised people in Sydney to stay at home on Monday because of disruption to transport.

chaos n. 混乱
• This place is in completely chaos.
这地方真是乱七八糟。
• economic/political chaos: 经济/政治混乱
potentially adv. 潜在地，随时可能会发生地
• potential adj. 潜在的 n. 潜力，潜质
life-threatening: 威胁生命的
flash floods: 骤发的洪水；山洪
• flash show: 快闪秀（机场、广场等）
emergency services: 紧急服务部门
disruption n. 中断；混乱




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