Overseas news

原文：

At least seven people were injured when a hydraulic pump on a ride explodedat a county fair, spewing shrapnel and hot fluid, fire officials said.
The explosion occurred Saturday evening on the Star Dancer ride at the ClarkCounty Fair about 32 kilometres north of Portland, Oregon, Fire Captain MarkKramer said.
The Star Dancer consists of a 30-metre tower with cars rotating around it ona wheel that moves up and down the tower. The explosion occurred when workerswere conducting maintenance on the ride, which had been having mechanical problems,according to local TV reports.
Six of the injured were fair workers. Three were treated at the scene and fourwere hospitalized.

注读：

At least seven people were injured（受伤） when a hydraulic pump（水泵） on a rideexploded（爆炸） at a county（县） fair, spewing shrapnel and hot fluid, fire（消防） officialssaid.
The explosion occurred Saturday evening on the Star Dancer ride at the ClarkCounty Fair about 32 kilometres north of Portland（波特兰）, Oregon（俄勒冈州）, Fire CaptainMark Kramer said.
The Star Dancer consists of a 30-metre tower with cars rotating around it ona wheel that moves up and down the tower. The explosion occurred when workerswere conducting maintenance on the ride, which had been having mechanical（机械的）problems, according to local TV reports.
Six of the injured were fair（展览会） workers. Three were treated（治疗） at the sceneand four were hospitalized（住院）.

语言点精解：

At least seven people were injured1 whena hydraulic pump on a ride exploded at a county fair, spewing shrapnel and hotfluid, fire officials said.
The explosion occurred Saturday evening on the Star Dancer ride at the ClarkCounty Fair about 32 kilometres north of Portland, Oregon, Fire Captain MarkKramer said.
The Star Dancer consists of a 30-metre tower with cars rotating around it ona wheel that moves up and down the tower2.The explosion occurred when workers were conducting maintenance on the ride,which had been having mechanical problems3,according to local TV reports.
Six of the injured were fair workers. Three were treated at the scene and fourwere hospitalized.

1. 此部分为被动语态。
2. 此部分为定语从句。
3. 此部分为定语从句。