Officials have not explained the delay, but not all areas have their databases ready yet.
虽然官方并未解释推迟原因,但并非所有地区都已经具备数据库条件。
The researchers presumed that electromagnetic field radiation from cell phone may result in high blood pressure though they have not explained the phenomenon properly by now.
尽管时下尚不清楚使用手机究竟是如何导致血压升高的,但是研究人员推测,可能是手机发出的电磁场不知何故使得血压升高。
Amazon explained that it did not have the rights to the books, so it erased them and returned the people's money.
VOA: special.2009.07.24
Bryan explained that he had to travel, because the Democratic Party did not have enough money to campaign in other ways.
VOA: special.2010.07.01
Then,as he explained later, he realized he did not have the right to kill himself.
VOA: special.2010.05.30
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