If the tough talk is not backed up by tough action.
如果强硬言论没有得到强硬行动的支持。
His claims are not backed by any scientific evidence.
他的说法没有得到任何科学证据支持。
The escape sequence is not a markup extension and is not backed by a class.
转义序列不是标记扩展，不受类的支持。
Try not to get backed into corners.
尽量不要陷入窘境。
This file was not successfully backed up.
这份文件没有成功地备份。
This file was not successfully backed up.
这份文件没有成功地备份。
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