His main tool is a device called a secondary-ion mass spectrometer.
他的主要工具是一种叫做二次离子质谱仪的装置。
In a mass exam of computer fundamental, an auto scoring system is a necessary tool.
在大规模计算机基础课考试中，自动阅卷和评分是必然选择。
It is also the important tool for the mass investors to achieve professional financing.
对于广大投资者来说更是实现专家理财的重要工具。
It is also the important tool for the mass investors to achieve professional financing.
对于广大投资者来说更是实现专家理财的重要工具。
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