前面用介词on，例如：
1、She advises the government on environmental issues.她是政府的环境问题顾问。
2、The Sami have strong views on environmental matters.萨米人在环境问题上观点很鲜明。
3、He was accused of not taking a stand on environmental issues.他被指责在环境问题上没有立场。
前面用介词on，例如：
1、She advises the government on environmental issues.她是政府的环境问题顾问。
2、The Sami have strong views on environmental matters.萨米人在环境问题上观点很鲜明。
3、He was accused of not taking a stand on environmental issues.他被指责在环境问题上没有立场。
