试验结果彻彻底底地支持了已有的对于雄性蟋蟀的审美标准——“不但身材魁梧而且叫声响亮”——但是有细微差别。
Their results did indeed reinforce the established beauty standards for male crickets - "be large and be loud" -but with a twist.
超低静音工作，机芯运作过程几乎不发生任何声响，完全符合国家环保标准，可以放在室内。
Ultra low noise operation, the operation of the process is almost no sound, fully in line with national environmental standards, can be placed indoors.
一种磁带录音机带速反映磁带，用于检验录音机带速偏差，其特征在于它使用国家标准规定的空白录音带在其录音带的声轨上录制上每秒发出一次短促声响。
The magnetic tape with speech prompt for testing tape speed deviation of audio recorder can play its role only by inserting it into audio recorder. It is used to repair and calibrate audio recorder.
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