4.Not that Charlie’s own life was easy!
Not that: to state that you are not suggesting sth 用于句首或短语前表达否定含义,“倒不是;并不是说”。 E.g: Not that I dislike the task, but (that) I am not equal to it. 并非我不喜欢这工作,而是我无法胜任。 不是我不肯借钱给你,而是我现在根本就没钱。 Not that I do not want to lend you money, but (that) I do not have any money now.