协变和逆变的区别对于张量的计算尤为重要，这往往会出现混合方差。

The distinction between covariance and contravariance is important for computations with tensors, which often have mixed variance.

youdao

在2008 ~ 2009年，研究人员对63名因爆炸而患有轻微脑损伤的现役军人进行弥散张量成像扫描，除了其中一名，其他62名军人的常规扫描都没有发现异常。

In 2008 and 2009, the researchers performed diffusion tensor imaging on 63 men who had recently sustained mild traumatic brain injuries from blasts; all but one had normal results on a standard m.

youdao

为了进行对照，还有21名最近同样经历过爆炸，但没有脑震荡症状的军人也进行了弥散张量成像扫描。

R. I. For comparison, 21 control subjects were also scanned — men exposed to blasts recently but with no symptoms of concussion.

youdao

And that generally is just given by the heat capacity the calorimeter times delta T, right.. Because the heat capacity of the calorimeter just like this thing is not strongly temperature dependent, OK.

一般它就由量热计的热容,乘以ΔT给出，因为，量热计的热容,就像这张桌子一样,并不强烈依赖于温度。

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