To give some detail, it’s /var that is writable, and mutable directories will have symbolic links pointing to subdirectories of /var:
The report pointed out how birth rates in the U.S. have been below the minimum replacement rate since 2008, meaning that the bulk of population growth since then has been the result of immigration. This has proved especially true for the country’s labor force. Nearly 80% of immigrants are of working age, according to the Census, and they account for 19% of the workforce, around 33 million people.
，这一点在Line官方版本下载中也有详细论述
Tkachuk expresses regret over Trump joke
U.S. women’s captain Hilary Knight on Wednesday referred to the comment as “distasteful and unfortunate.”