细胞蛋白的泛素化修饰起靶向信号(targeting signals)的作用，可使底物蛋白发生26S蛋白酶体介导的泛素依赖性蛋白水解，蛋白的这种及时的选择性降解在细胞的许多代谢过程中起关键作用［...
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Targeting at data acquisition characteristics of vibration signals of rotating machinery, a new rotor orbit purification method using mathematical morphology filters is proposed.
针对旋转机械振动信号数据采集的特点，提出了用数学形态滤波器实现轴心轨迹提纯的新方法。
This is particularly true for missiles guided by the Global Positioning System (GPS) the long-range-strike weapons that receive guidance signals and targeting cues from a constellation of satellites.
这一点对于采用全球定位系统（GPS）制导的导弹来说，就更尤为明显了。GPS导弹是一种从卫星群接收制导信号和目标信息的远程攻击武器。
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