by default

基本解释

Since we have only one mapping, it is selected by default.
由于我们只有一个映射，所以它是缺省选中的。
By default I have 30 seconds to do something with the message.
默认情况下我有 30 秒的时间对消息做一些事情。
This one makes recursive calls by default; therefore, it will also find method declarations in any inner classes.
默认情况下，它将进行递归调用。因此，您也可以在任何一个内部类中发现方法声明。

"Since I was 14,I have liked comics, so of course by default, we started going to Comic Cons when he was young.
ArgC How many words were typed at the prompt, by default, Arg C, should always be at least one.
提示符那里默认要输入多少单词，至少需要一个单词。
哈佛公开课 - 计算机科学课程节选
And realize too, as we say on this home page here, by default, we anonomize you when you log into this bulletin board, whereby, you're all logged in as quote unquote students.
并且认识到，像我们说的这个主页，默认情况下，当你登陆这个电子公告牌，我们禁止你们，都匿名学生登陆。
哈佛公开课 - 计算机科学课程节选

Yet, Clinton's popularity is by default since many Chinese can't even name any other candidates.
NPR: U.S. Election: China's View