sustain time meaning in English

保持时间

Due to too much short sustained time duration of oscillation for the blades and too wide distribution of oscillation frequency over the audio frequency range , a procedure of variable gate frequency measurement has been applied to the design of frequency measuring instrument with a micro - - controller unit ( mcu ) as its core . this procedure features a high precision and rapid speed
由于叶片振动持续时间很短，且振动频率在音频范围之内分布较广，故在设计以单片机为核心的测频仪时采用了变闸门测频法，该方法具有精度高、速度快的优点。