婴儿发出了一些含糊不清的声音。

The baby ___utters some unclear sounds.

小狗发出低沉的呜咽声，因为它想念主人。

The puppy ___utters a low whine because it misses its owner.

她突然大声说出了自己的真实想法。

She suddenly ___utters her true thoughts out loud.