David Michaels is professor of environmental and occupational health at the George Washington University Milken Institute School of Public Health. He served as Assistant Secretary of Labor for the Occupational Safety and Health Administration (OSHA) under President Barack Obama from 2009 to 2017.
退屈な英語の授業はもうおしまい！ 長年英語を教えてきたから言える、英語をより簡単に習得するためのポイントは次の3つ。 １）面白くなければいけない。これは何事にも言えること...[SEE MORE]