So now we can see the problem here: though the Chinese people themselves had made great effort to speak up, the official communication channel is completely shut down.

所以现在我们可以看出问题所在：尽管中国人自己做出了巨大努力来表达他们的声音，官方的交流渠道却是完全关闭的。

youdao

Many known methods of remnant pump detection and automatic laser shut-down use loss of signal on the data channel to detect hazardous emissions.

许多已知的残余泵浦检测和自动激光关断的方法利用数据信道上的信号损耗来检测有害发射。

youdao