According to the author, what is the “rule of thumb”?
举一反三
- According to the author, what rule can be applied to help us make the best choice among the conflicting proposals made in the name of environmental protection?
- According to the author, what is a friend?
- According to the author, what was understood as a norm?
- According to the author, what is the mission of Google?
- According to the author, what sells well in Europe___________.