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- It is also widely available, cheap, resistant to RFI, and quite remarkably noise free, since it has low output dV/dT and does not generate a supply current pulse. 优点是应用广泛、价格便宜、抗射频干扰（RFI），而且噪声相当低（得益于输出压摆率低，不会产生开关电流）。
- The PRT system would be available all of the time, would be electrically-powered and essentially pollution and noise free. 另外值得注意的是，选择题（包括单选和多选）的出题频率进一步提高。
- A new approach using scalogram of wavelet transform for travelling wave transient signal detection, under noise free condition or noise condition separately, was described. 摘要介绍小波变换定义、性质和时间尺度分析，研究小波变换的尺度谱检测无噪声和有噪声条件下的行波暂态信号的能力。
- The Alps potentiometers for volume control are marvelously smooth and noise free, allowing a very gradual increase in sound levels even in the 7 - 10 o'clock region. 音量控制电位的阿尔卑斯山是不平凡的顺利和无噪音，使声音的水平在逐步提高非常即使在7-10点区域。
- To illustrate the influence of different regularization operator on the inversion of water content distribution from surface nuclear magnetic resonance (NMR) signal, synthetic data of noise free and contaminated have been investigated. 摘要不同的模型约束对基于正则化反演技术的地面核磁共振测深数据反演影响很大。
- By choosing appropriate parameters of the noise and the system, the OAG of the system can be larger than one, i. e., the OAG of the noisy system can be larger than that of the noise free system. 选择适当的参数，系统输出幅度增益可以大于1，即有噪声时的系统输出平均幅度可以大于无噪声时的输出幅度增益。
- Based on the principle of modulus maximum, a new approach using scalogram of wavelet transform for transient signal, under noise free condition or noise condition separately, is described. 针对光滑瞬态信号的特点，研究了信号在高斯连续小波变换下具有的时频特性，提出了一种适用于检测光滑瞬态信号波至点的新方法，通过建立的检测函数能精确定位信号或含噪信号的波至点。
- The dentist's drill made a lot of noise. 牙钻发出很大的噪音。
- DMZ low density solid free drilling fluid is mainly comprised of water, high molecular polymer and natural high molecular compound. 无固相聚合物钻井液是一种抑制性、防塌性能力强的钻井液体系。
- Reading occupies most of my free time. 阅读占去了我大部分的闲暇时间。
- The noise of the drill pounded at my ears. I thought I would lose my hearing. 钻机的噪音隆隆震耳。我想我的耳朵都要震聋了。
- A loud noise from the street diverted my attention. 街上一阵喧闹声转移了我的注意力。
- The crew remained free from scurvy. 那些船员仍然没有患坏血病之虞。
- The noise awoke her from her revery. 这声音把我她从沉思中惊醒。
- That noise is driving me frantic. 那种噪音真要把我弄疯了。
- He's a fervent believer in free speech. 他是言论自由的强烈信仰者。
- The thick walls deadened the noise from the street. 这道厚墙隔绝了街上的噪音。
- A noise abatement notice is served on the club. 向俱乐部发停止大声喧哗的通知。
- She picked up a new magazine with her free hand. 她用空着的一只手拿起一本新杂志。
- The noise of traffic grows louder and louder. 交通的噪音变得愈来愈大。
