You can second guess yourself, and then triple and quadruple guess when it comes to making a demo, but in reality, it's kind of like a test.
你可以对自己进行二次质疑，然后反复斟酌，但现实是，这更像一种考验。
In this article the test results of the flow characteristics of the two phase flow within a quadruple-lead ribbed tube on a test bed are described.
本文介绍了在气水双相试验台上进行的国产四头内螺纹管中流动特性的试验情况。
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