不卫生环境下制备或存放的食物是造成腹泻的另一重大因素。
Food is another major cause of diarrhoea when it is prepared or stored in unhygienic conditions.
野牛们极大的头部呈楔形状，眼睛如银元般大小。 这些两千磅重的庞然大物是另一个空间和年代的象征。
With their huge, wedge-shaped heads and silver-dollar-size brown eyes, the 2, 000-pound animals are symbols of another place and time.
比这些搭配更好的还有大朵重瓣的花卉：一朵就满掌的大花。
Even better than these were the large, multi-petalled blooms: single flowers that fill the palm of your hand.
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