Custom classes cannot be used as the root element of a page if defined in the same assembly.
在相同组件中定义的自订类别可以当做页面的根项目。
Append — indicating that the value of arg is to be appended to the value of the variable, if defined.
append——指示如果定义了arg的值,其值将会附加到变量值之后。
Prefix — indicating that the value of arg is to be prepended to the value of the variable, if defined.
prefix——指示如果定义了arg的值,其值将会添加到变量值前面。
And maybe if it some well-defined temperature and pressure.
这两个态可以具备确定的,温度和压强。
If we defined food differently: that it's something that nurtures the body, something found in nature, something that doesn't harm the environment-- there are a number of criteria one can apply to define a food-- then we might come up with a different definition than this, but this is the way the nutrition field generally looks at it.
如果我们给出不同的定义,滋养身体的物质,在自然界找到的物质,不会威胁到身体的物质,有很多标准可以拿出来定义食物,我们也许可以就此重新进行定义,但这就是营养学看待食物的方式
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