At this point, DB2 replaces these missing characters with a substitution character.

这时，DB 2用一个替换字符来替代这些缺失的字符。

youdao

You can simply add missing characters, or select an existing character, and modify its appearance.

您可以简单地添加缺少的字符，或选择一个现有的特色，并修改其外观。

youdao

If missing characters are presented using their numeric representation, use the hexadecimal (not decimal) form since this is the form used in character set standards.

如果缺失的字符用它们的数字编码来展现，要用字符集标准使用的十六进制而不是十进制来进行展现。

youdao

You'd just end up with something that didn't have the--it was missing the bottom line, the sort of gravely character that was going to sort of underpin it all.

NPR: David Gray, Beyond 'Babylon'

His family have said his disappearance is out of character and it is not known why he has gone missing.

BBC: CCTV released of missing malaria trial man

The cameras roll and without missing a beat, he slips into his deranged millionaire persona, a character that has popped up a bit over the past few years, as Hodgman has wrapped up his trilogy of "complete world knowledge, " the last entry of which, "That is All, " was released in paperback and audiobook forms this week.

ENGADGET: John Hodgman on the death of publishing and being a Mac trapped in a PC's body