The psychologist Dale Kunkel showed that the practice of host selling reduced children's ability to distinguish between advertising and program material.
心理学家戴尔·昆克尔指出，对销售主持人的应用减弱了儿童辨别广告和节目内容的能力。
2
The host, whether it is a person, bird, or pig, provides a place for influenzas to make contact, exchange genetic material, and form new viruses.
无论是人、鸟还是猪，作为宿主都能为流感病毒提供接触、交换遗传物质和形成新病毒的场所。
3
Since the material was first created in 2004, its unique electronic and mechanical properties have amazed researchers who say that it could be used in a host of device applications.