Metallography
n. 金屬平印術, 金相學\\n[化] 金相學
??? 情景例句
How many classes are you taking this semester?
這學期你有多少課？
Here are the two originals of the contract we prepared.
這是我們準備好的兩份合同正本。
Yet a great many processes depending on such research are sought for with complete secrecy until the stage at which patents can be taken out.
然而，依賴這種研究的很多工藝程序是在完全保密的情況下進行的，直到可以取得專利權的階段為止。