calibrate：If you calibrate an instrument or tool, you mark or adjust it so that you can use it to measure something accurately.
bears the risk of ：承擔風險
gauge：If you gauge the speed or strength of something, or if you gauge an amount, you measure or calculate it, often by using a device of some kind.
operate largely by feel：做事憑感覺
crunching ：To crunch numbers means to do a lot of calculations using a calculator or computer.
pry：If you pry something open or pry it away from a surface, you force it open or away from a surface.
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