Because sometimes there's this fear and there's this apprehension that if I say anything, I'm afraid I'll offend, or I'm afraid I'll trigger something, so the common default is just saying nothing.
因为有时如果我说点什么， 会有这个害怕、那个担心，比如： 恐怕我会触犯军规， 或恐怕我会挑起事端， 所以通常保持沉默，什么也不说。