Unlike strings, lists are mutable. When the bracket operator appears on the left side of an assignment, it identifies the element of the list that will be assigned.
和字符串不同的是，列表是可以修改的。方括号运算符放到一个赋值语句的等号左侧的时候，就会把对应位置的列表元素重新赋值。
Insure that the left-hand thread is facing the right side of the Bottom Bracket assembly!
投保的左边线正面临支架组装右侧底部！
Insure that the left-hand thread is facing the right side of the Bottom Bracket assembly!
投保的左边线正面临支架组装右侧底部！
应用推荐