- 推荐网络例句
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In Augustine's time they were free associations.
在奥古斯丁的时间，他们可以自由协会。
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Ultrasonic is a kind of mechanical wave that frequency is upper 20KHz. Ultrasonic may be generated by many ultrasonic transducers.
超声波是频率高于20KHz的机械波，它可由多种能量转换器转变而成。
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" Acetylcholine: Ester of choline and acetic acid, a neurotransmitter active at many nerve synapses and at the motor end plate of vertebrate voluntary muscle s."
乙醯胆碱：胆碱和醋酸的酯，是许多神经突触和脊椎动物肌肉运动神经终板的神经介质(在重症肌无力里，这种活动停止)。
Don't
stop moving...