1. A baseline is a software configuration management concept that help us to control change without seriously
impeding justifiable change.
基线是一个软件配置管理的概念，它帮助我们在不严重阻碍合理变化的情况下来控制变化。
2. China's exports plunge continues to be worse than expected,
impeding recovery for the first major economy to emerge from the global slump.
中国出口的持续下降比预期中的更糟糕，阻止了这个第一个主要经济体走出全球经济衰退的复苏。
3. Any technique used by a DUT/SUT to attempt to avoid frame loss by
impeding external sources of traffic from transmitting frames to congested interfaces.
背压是指DUT为了避免发生帧丢失，阻止外界数据源向发生拥塞的接口发送数据流所采用的任何技术。
