The "e", "e -", "e", or "e -" formats indicate that a sign character should only precede negative exponents.

或“e -”格式指示符号字符仅置于负指数前面。

youdao

Floating-Point literals may also be represented using exponential notation: a real number followed by the letter e(or E), followed by an optional plus or minus sign, followed by an integer exponent.

此外，还可以使用指数记数法表示浮点型直接量，即实数后跟随字母e或E，后面加上正负号，其后再加一个整型指数。

youdao

Confederate General Robert E.Lee saw it as a sign of weakness in the northern war effort.

VOA: special.2009.11.05

If you want to get those e-mails, you got to sign up for the course because I push a button and it goes to anybody who's signed up there.

如果你想收到邮件的话,你得选我的课,因为我点一下按钮,邮件就发给选课的同学了

耶鲁公开课 - 基础物理课程节选

The country has since adopted e-voting, an e-health system and introduced the ability to sign documents using an electronic signature.

WSJ: The Many Reasons Estonia Is a Tech Start-Up Nation

Liverpool manager Kenny Dalglish, who was in charge of the club at the time of the disaster, had urged his Twitter followers to sign the e-petition.

BBC: Kevin Williams

As I have written, this gift-giving service is a move by Facebook into the e-commerce market, and likely a sign of more e-commerce moves to come.

FORBES: Move up http://i.forbesimg.com t Move down