I don't know the punch line, but rest assured it will have something to do with the microbiologist peering through a microscope, and the lawyer chasing ambulances.
我不知道这可笑在哪里，但是那些认为可笑的人们一定会想到微生物学家整天对着显微镜研究，而律师天天追着救护车跑。
On the basis of experiment, this paper proposes how diaphragms are used correctly with tooling microscope line equipment to improve measuring precision.
本文以实验为基础，提出在工具显微镜类仪器中，为了提高测量精度，应如何正确使用光（门东）。
Methods T he cultured U251 glioma cell line was detected with atomic force microscope(AFM) .
方法应用原子力显微镜，对U251胶质瘤细胞系进行观测。
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