BBC在线收听下载:联合国气候机构警告录得全球最暖气温

1.we've seen all of the upheavals in the wake of the so-called Arab Spring.

in the wake of 紧紧跟随；随着…而来；作为…的结果；仿效

Dolphins sometimes play in the wake of the boats.
有时海豚在船的尾流中嬉戏。

Social problems cropped up in the wake of natural disasters.
自然灾害之后，出现了许多社会问题。

2.Filmed in broad daylight, it clearly shows a white police officer holding the unarmed black man in a headlock.

in broad daylight 在大白天；公开地

Drugs are sold unashamedly in broad daylight.
在光天化日之下公然出售毒品。

The recent murder happened in broad daylight in a supposedly "safe" part of London.
最近的这起谋杀案是光天化日之下在伦敦一个据称“安全”的城区发生的。