可以对婴儿在两次刺激之间注意力的时长和频率进行精确测量。
Precise measurements can be made of the length and frequency of the infant's attention between two stimuli.
精确的频率和这些自然的令人不安的影响来自于一个品种变成另一个品种，以及那些用过的克隆程序带来的各种变化。
The precise frequency and nature of these disturbing effects varies from one species to another and may vary with the cloning procedure that is used.
高稳定的激光可以产生极细的齿，这样可以非常精确的测量特定的频率或频率变化。
A highly stabilized laser produces very fine teeth, enabling highly precise measurements of specific frequencies or changes in frequency.
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