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Rubber ducks have long been popular bath-time toys for children. However, they may not be as innocent as they look. In fact, they harbor harmful bacteria that could spread diseases. A study by American and Swiss researchers examined the microbes present inside the yellow toys. The researchers found potentially pathogenic bacteria in four __1__ the five toys studied, including a bacterium often associated with infections that people acquire in hospitals.
The researchers noted that the composition of the material used in making the rubber ducks was a key factor. Certain materials release carbon, which feeds bacteria and __2__ their growth. More specifically, the research findings revealed a high concentration of bacteria and fungi, with up to 75 million cells per square centimeter __3__ inside the rubber ducks.
Lung cancer is mostly associated with smoking.
肺癌大多與吸菸有關。
The stadium is very large and can hold up to 60,000 people.
那間體育館很寬敞,可容納多達六萬人。
You should always be aware of your surroundings.
你隨時要了解周遭的環境。
Mary was aware of Tom’s bad intentions, so she refused to go out with him.
瑪莉察覺出湯姆不懷好意,所以拒絕和他約會。
The government has taken measures to improve the nation's infrastructure.
政府已採取措施改善該國的基礎建設。