Please demonstrate how to say :
丝类是一种纤维蛋白，由蜘蛛、桑蚕和某些昆虫的腺体所产生。
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Say it as loud and as clear as you can! Please only say the given word/phrase once, and do not say anything else or explain anything.
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Click the red button and your browser will ask for permission to use your microphone. Allow it and start recording.
Say it as loud and as clear as you can! Please only say the given word/phrase once, and do not say anything else or explain anything.
You may then listen to your recording again. Submit it if you are happy with it.