The dose of testing agents must be precise.
试验药物剂量必须精确。
The assembling of the parts of a watch must be precise.
一块手表零件的组装要十分精细。
The broadcast ephemeris, which is the basic of satellite navigation, must be precise and real time.
卫星导航定位的基础，要求有较高的精度和实时性。
The broadcast ephemeris, which is the basic of satellite navigation, must be precise and real time.
卫星导航定位的基础，要求有较高的精度和实时性。
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