你们相互认识吗？
ECH (Echo Canceller Hybrid System) is used to remove sidetones.
消除侧音采用了回波相消技术。
At the same time, they were influenced and supported by ech other in their spreading.
同时，这两者又在彼此的流传中相互影响，相互支持。
Escape slide inflation is automatic if the door is opened with the Emergency Control Handle (ECH) in the ARMED mode.
如果应急控制手柄(ech)在ARMED(待命)模式时舱门打开，撤离滑梯自动充气。
This project will involve a formal paper and a formal presentation in front of the class as well as feedback delivered to ech student from each student.
项目研究包含了一个正式的论文和在全班面前的展示，同时也包含了每个学生给予的反馈。
This project will involve a formal paper and a formal presentation in front of the class as well as feedback delivered to ech student from each student.
项目研究包含了一个正式的论文和在全班面前的展示，同时也包含了每个学生给予的反馈。
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