Both single-quoted or triple-quoted strings may be preceded by the letter "r" to indicate that regular expression special characters should not be interpreted by Python. For example.
使用单引号或三重引号的字符串前面可以加一个字母“ r ”以表示Python不应该解释规则表达式特殊字符。
2
AIM: to observe the distribution and expression of two subtypes of very low density lipoprotein receptor (VLDL r) in diabetic adipose tissues to investigate their changes and significance.