With a stable light source, this can be determined from a preliminary observ ation.
在光源稳定的情况下, 可通过预先观测来确定.
辞典例句
Dial - layer bulletproof toughened glass door ensures absolutely clear observ ation on objects in chamber.
钢化、防弹 双层 玻璃门观察工作室内物体,一目了然,能够向内部充入惰性气体.
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