很难用这样的非实验数据来论证原因。
It is very hard to demonstrate causes using non-experimental data such as this.
然而，使用诸如此类的非实验数据来证明原因是非常困难的。
However, it is very hard to demonstrate causes using non-experimental data such as this.
以铜模铸造法制备的铁基大块非晶合金为例，列出了该材料的一些实验数据。
The experimental data of bulk Fe-based amorphous alloys prepared by copper mold casting were listed.
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