petrographic microscope的用法和樣例：
例句
- He focuses the lens of a microscope.
他調整顯微鏡的透鏡以定焦點。 - The growth of optical anistropy of the mesophase was observed continuously under a hot stage optical microscope.
聚合產物在熱台偏光顯微鏡下觀察中間相轉化行為。 - A metallographic microscope is used to observe the micrographs of the porous alumina membrane anodized by first and second steps.
用金相顯微鏡觀察了一次陽極氧化和二次陽極氧化后多孔氧化鋁的表面形貌。
