他试图说话，但这一次，他已说不出声。
驴子不是不出声而是不会说话。
因为它们在不出声时给你温暖的赶脚。
They both give you a nice warm feeling without making any sound.
他说不出话，他叫不出声。
她张开嘴，却发不出声音。
我不出声，因为我已经全情投入了这情调。
I do not say anything, because I have been full of this sentiment.
那些离别和失望的伤痛，已经发不出声音来了。
那些离别和失望的伤痛，已经发不出声音来了。
Those disappointed with the pain of separation and have to pay a voice.
伯莎企图讲话，但她的喉咙干涩，她发不出声音。
Bertha tried to speak, but her throat was dry, and she could utter no word.
这个孩子看见爸爸正对他怒目而视，便不出声了。
The boy made no noise when he saw that the father was scowling at him.
如果你的老师提出问题，你不出声，也是不礼貌的。
It's also bad manners to stay silent if your teacher asks a question.
如果你的老师提出问题，你不出声，也是不礼貌的。
It's also bad manners to stay silent if your teacher asks a question.
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